CHEMIX School - Change Log

Chemistry Software Download

CHEMIX School 16.1 (Latest Evaluation Version Released October 28, 2025)

In this upgrade, an Acid/Base Titration Tool has been introduced in CHEMIX School.

Improved in this upgrade: Automatic graph updates (for most of the tools that use data inputs for graphing, such as ternary plot, binary plot, fuction plot etc.): The graph now recalculates automatically when you add multiple characters at once - such as pressing Enter, inserting a new line, or pasting data from the clipboard - reducing the need to press the “Calculate” button.

.Added: Acid/Base Titration Tool

Key Features and Use Cases

- Edit and plot titration curves for inclusion in lab reports or teaching materials.

- Smooth titration curves using spline overlays to minimize noise and prevent false positives in derivative-based detection of pKa and equivalence points.

- Compare experimental curves with simulated (theoretical) curves to visualize noise, experimental imperfections, and deviations from ideal behavior, helping identify sources of error and evaluate the accuracy of the experiment.

- Prepare laboratory titration tutorials by simulating different concentrations and acid/base combinations.

Added a video tutorial: Acid-Base Titration Software Tool for Chemistry

Related links:
Acid-Base Titration - User Guide
Acid-Base Titration - Theory

Fig. CHEMIX School Acid-Base Titration Tool
acid base
titration

Digitally Signed by DigiCert (October 17, 2025)

- From today, CHEMIX School is digitally signed and timestamped by DigiCert for authenticity and long-term validity. Functionality is unchanged from previous versions.

CHEMIX School 15.2 (Latest Evaluation Version Released September 22, 2025)

Upgraded: Ternary Plot: To have more working area when working inside the triangle, a "Maximize Diagram" option has been added.
Also attached "Move handles" to the 3 Angled Text arrows surrounding the ternary diagram.

- The old Acid-Base pH Indicator Chart has been replaced by a new, more comprehensive one.

Fig. CHEMIX School Acid-Base pH Indicator Chart
acid base ph indicator chart

CHEMIX School 15.1 (Latest Evaluation Version Released June 19, 2025)

Added: Reaction Order (Reaction Order in Chemical Kinetics). Determine the order of a reaction based on empirical data. Features - Best fit (R²), Graphing Plot against, Hi resolution clipboard image, zoom.Dark mode Examples etc.

Upgrade - Concentration and Dilution calculator: Added Solubility Curve Graph, added illustrations and fixes in stock concentration section.

Word and Letter Quiz: Added "Emulsions and Interfaces 60-Word Quiz" A quiz dedicated to the science of mixing immiscible phases, stabilizing boundaries, and delivering actives through emulsions, micelles, and related systems in cosmetics, pharmaceuticals, and material science.

                                           Added "Krebs Cycle" (for up-and-coming biochemists)

Upgraded:Ternary Plot, Binary Plot : Added "all" bold font option for all data set text

Added three new video tutorials :
                                                                      Emulsion Formulation Using Ternary Diagrams
                                                                Reaction Order in Chemical Kinetics
                                                                    Preparation of Solution - Concentration Conversion Tool.



Related links:
Reaction Order in Chemical Kinetics
Preparation of Solutions Calculator

Fig. New in CHEMIX School v 15.1 - Reaction Order in Chemical Kinetics

Fig. Updated in CHEMIX School 15.1 - Preparation of Solution Calculator And Concentration Conversion Tool

CHEMIX School 14.5 (Evaluation version released 2025-03-24)

Periodic Table Update

Added: Electron Affinity as a new property.
Added: "Dark Mode" as the 7th option in the 'Background Color' menu.

Molecular Calculator Update

Added: Speed-Touch Buttons for frequently used elements and functional groups, enabling faster and more efficient calculations on touch-enabled devices.
Added: 'Background Color' options, including Dark Mode.
Added: Drop-down list with 20 amino acids.
Added: Copy to Clipboard button.

Ternary Plot Update

Added: Move handles (squares) to the center of the previously fixed axis and title text, allowing users to reposition them using the mouse.
Added: Bold formatting as an option for title and axis text.

Binary Plot Update

Added: Electron Affinity as a new property for scalable element property plots in the 'F(x)=' drop-down combo box.
Added (in the 'F(x)=' drop-down combo box): Title (Property), X-axis (property with units), and Y-axis (atomic number) text.
Added: Move handles (squares) to the center of the previously fixed axis and title text, allowing users to reposition them using the mouse.
Added: Bold formatting as an option for title and axis text.

Related link(s):
Formula Weight Calculator

Video: New Features in CHEMIX School v14.5

Fig. CHEMIX School Formula Weight Calculator with Speed-Touch Buttons
formula
weight calculator

CHEMIX School 14.1 (Evaluation version released 2025-02-19)

Added: Hygrometer Calibration   - Use a Psychrometric Calculator to determine the the relative humidity by measuring the dry bulb and wet bulb temperatures.
              Related links:
                           Psychrometric Calculator
   Psychrometric Celsius and Fahrenheit Tables
     Dry Bulb / Wet Bulb Method for Calculating Relative Humidity

Periodic Table: It is now possible to change the 'Background Color' surrounding the Periodic Table. Additionally, a new view option, 'Show Enlarged Name', has been added, which is particularly useful in the classroom.

Upgraded:Ternary Plot, Binary Plot and Function Plot: The graph will now update automatically when data is pasted into the data entry field.

Also: In "File->Setup", It is now possible restore important settings, including radio buttons, check-boxes, and more, to their default values by selecting 'Restore Default Settings'.
           Improved functionality, enhanced GUI, and minor fixes.

Video: A video titled Hygrometer Calibration has been added, demonstrating how to conduct a Dry Bulb/Wet Bulb experiment using a single thermometer to calibrate hygrometers, which are often not very accurate. It also explains how to use CHEMIX School software to calculate relative humidity based on the experiment.

Fig. The latest addition to CHEMIX School - Hygrometer Calibration
Hygrometer
Calibration

CHEMIX School 13.5 (Evaluation version released 2024-10-01)

Ternary Plot: You can now view, move, add, delete, and switch between spline points and fill points without needing to explicitly select options using radio buttons.

Binary Plot: To prevent the graph from unintentionally rescaling itself, a "Fixed Scale" checkbox has been added. Additionally, similar to the ternary plot, you can now view, move, add, delete, and switch between spline points and fill points without having to manually select them via radio buttons.

Gas Equations: A Clausius-Clapeyron Relation Equation Calculator and Plotter has been added to the "Gas Equations" section, enabling the calculation and plotting of vapor curves.

More about the Clausius-Clapeyron Relation Equation Calculator and Plotter
Clausius-Clapeyron Boiling Point Experiment

Fig. Clausius-Clapeyron Relation Equation Calculator and Plotter.
boling point
curve water

CHEMIX School 13.1 (Evaluation version released 2024-09-02)

This version of CHEMIX School, which focuses on magnetism, features tools for calibrating gaussmeters with Axial Field Probes using a solenoid (air coil), calculating magnetic field strength, and assessing the power of magnets. All these functions are conveniently accessible within a single window.

The new CHEMIX School tool is ideal for:

Calibrating gaussmeters in DIY microcontroller projects.
Testing gaussmeters with Axial Field Probes.
Determining the strength of magnets using the Magnetic Field Strength Calculator.

More about these new tools here:
Gaussmeter Calibration
Magnetic Field Strength Calculator

gaussmeter calibration magnetic field strength calculator
magnet steel pull force calculator

CHEMIX School 12.5 (Evaluation version released 2024-02-12)

                   Version 12.5 brings several enhancements:

GUI Optimizations:
    Ternary Plot, Binary Plot, and Periodic Table: The graphical user interface (GUI) has been optimized.

New Options: Additional features have been introduced.
    Ternary Plot:
      Introducing the FreeDraw option, enabling users to draw freely on the canvas.
      FreeDraw also facilitates the placement of a scalable arrowhead at the initial spline/polygon point.
      Added a Tick density combo box, more examples, and guidance.
        Simplified operations with the replacement of the Spline/Fill mode combo box selection with Spline/Polygon & Fill radio buttons.
    Periodic Table:
        Enhanced viewing of groups and periods by clicking on group numbers (above) or period numbers (left side) to highlight both group and periods.
      Added the ability to hide/show displayed content in the table with a single mouse click.
          Common Improvements in Ternary plot & Binary Plot:
              Reduced flickering when hovering the mouse outside the triangular (or rectangular) frame if "View coordinates" is enabled.
                Improved interaction: Clicking on a Spline-point or a Fill point now automatically selects the corresponding element in the combo box.
Productivity Enhancement Example: Changing the Color of a Fill Point:
    New Approach (Only 4 Steps):
      1.Click on a fill point.
        2.Open the fill point Color combo box.
        3. Scroll to the desired color.
        4.Select the color.
    Previous Approach (6 Steps):
      1.Open the fill point combo box.
        2.Scroll through the combo box to locate the fill point.
        3.Select the fill point.
        4.Open the fill point Color combo box.
        5.Scroll to the desired color.
        6.Select the color.

These enhancements streamline user interactions, making tasks more efficient and user-friendly.


CHEMIX School 12.2 (released 2023-10-31)

Added: Guess The Word - A Hinted Science Word Quiz.
              "Through hinting, this science word game promotes learning and understanding of science subjects, making it an excellent resource for students and teachers."

         Topics:
          - The Elements
          - Chemistry
          - Physics
          - Biochemistry
          - Biology
          - Pharmacology
          - Nuclear physics
          - Astronomy
          - Virology
          - etc.

                       Also, added a very affordable alternative to the perpetual CHEMIX School license, namely a one-year license.

CHEMIX School 12.0 (released 2023-7-25)

   Added: Guess The Letter - A Science Word Quiz - Testing of one's vocabulary (in a given category) and deductive skills.
          ..."The CHEMIX School Science Word Quiz, is a classic word game that combines elements of guessing, deduction, and risk-taking.
            It can be used as an educational tool to enhance vocabulary and language skills."
         Topics: (A few examples):
          - The Elements
          - Chemistry
          - Physics
          - Biology
          - etc.

CHEMIX School 11.7 (released 2023-3-14)

YouTube video Tutorials

Added new design and new features in Solubility Product.
           - Added a Q&A section.
           - New copy to clipboard options: Equation of dissociation and Solubility product expression.
           - Fields that shows details in the calculation e.g. Ca₃(PO₄)₂ in a 0.2M CaF₂ solution:    Ksp = [0.2+3*x]³[2x]² where x represent the concentration of dissolved Ca₃(PO₄)₂
           - Also other improvements such as an increased number of available compounds and Ksp values new videos etc.

CHEMIX School 11.5 (released 2023-1-18)
Added a "gray mode"-option to prevent eyestrain.
   The following graphical tools have been upgraded with this feature:
           - Ternary Plot
           - Binary Plot
           - Curve Fit, Function Plot and Data Logger
           - Molecular 3-D Viewer

CHEMIX School 11.0 (released 2022-11-28)

YouTube video Tutorials

   - Electrochemistry: Added
                                 - Design changes
     - Tutorials Calculation of solubility product K_SP using cell potentials etc.
   - Additional Gibbs free energy equation:    Delta G   =   -n   F   E⁰    =    - R   T   lnK
                                 - Spontaneous/Non-spontaneous information included in overall reaction.
                               - More cell potentials
- Binary Plot: Added
-   New phase diagrams

CHEMIX School 10.0 (released 2021-4-12)

           - Ternary Plot: Added
-   A new "Interpolation" section. It is now possible to interpolate (splines) using data-set points directly in addition to already existing manual option in the "Splines & Fill" section
                                      It is also possible to change both width and color of interpolated-splines.
                                 - In "Splines & Fill" section. Added a polygon option "Poly" (in addition to already existing splines)
                             - Automatic centering of Title text, A,B and C-axis text + A,B and C angled text
                             - Replaced Text On/Off check box by six radio buttons for scaling of default font size. Text sizes: [-t] (Text Off), [sf],[mf],[bf],[hf] and, [gf].
   Note: It is possible to override default settings using a command like [ih] (ignore hide)    e.g.     10 20 SampleText [ih][hf]        (ignore hide + huge font)
                               - Medium font data/text entry command added - [mf] .
                             - Increased Line/spline width in "Splines & Fill" section
   - Increased size of plot area.
- Binary Plot: Added
- Polygons "Poly" (in addition to splines)
    - Color of "Interpolate"- lines can now changed at will.
    - Automatic centering of Title text, X-axis text and Y-axis text.
                                - Replaced Text On/Off check box by six radio buttons representing selectable global default data entry commands Text sizes: [-t] (Text Off), [sf],[mf],[bf],[hf] and, [gf].
                              - Medium font data/text entry command ( [mf] )
             Function Plot: Added
                                 - Automatic centering of Title text, X-axis text and Y-axis text.

          - Balance: Added (Balansing chemical equations)
- The matrix and coefficients are now visible in a new text box.
                              - Tutorials - how to balance chemical equations using the algebraic method.

CHEMIX School 9.00 (released 2020-11-25)

New v9.00 YouTube video Tutorials

     - Binary Plot: Added - Logarithmic plot (Base 10)
- Select plot type: X Y (normal XY plot) , log(X) Y    , X   log(Y) ,       log(X)    log(Y)
                                            - Select tick mark density: Options: Automatic or manually. "Auto"       "| | | | |" (dens)    "| | | | |" (denser)            "||||||" (densest)
                                            - View coordinates: Helpful for placing text in the right spot
                                            - Stop color fill by interpolation lines "Check/Uncheck" - Use data-set interpolation lines or line segments (poly-line, cub.spline) as a color-fill barrier.
                                      - In Interpolate section: Added Line/spline width (1-4)
                                            - In Interpolate drop-down combo-box added: Vertical plot: XiYi to Xi(Yi=0)   Suited for presentation/visualization of data acquisitions from e.g. Geiger-counters.
- In Splines & Fill section: Added Spline width (1-9)
                                            - Frame width: Added (1-4)
- Changed "Check/Uncheck" Splines to "Check/Uncheck" Splines/fill points
                                            - New font commands (color):    [Rf] (Red font)    [Bf] (Blue font) [Gf] (Green font)   [Wf] (White font [Yf]    (Yellow font)       [Ff] (Fuchsia font)      [Cf] (Cyan font)
                    - Styles font commands:    [tf] (thick font)    [if] (italic font) [uf] (underlined font)
                                             Also added a total of 17 new commands to allow changes (from default) to other symbol types, colors and sizes in the same data set.
                                              - Symbol change           - [1s] (circle)    [2s] (square)    [3s] (diamond)      [4s] (triangle) [5s] (cross)      [6s]   (ring/hollow circle)
                                                - Symbol color change -    [Ws] (White)        [Rs] (Red)       [Gs] (Green)     [Bs]    (Blue) [Ys] (Yellow) [Fs] Fuchsia    [Cs] (Cyan)    [BS] (Black Symbol)
                        - Symbol size change    -    [ss]    (small symbol)       [ms] (medium symbol)          [bs] (big symbol)


    - Ternary Plot: Added
           - (Check/Uncheck) "#%"    Now it is possible to add a %-sign to the percentage ABC-axis-numbers   i.e. from     0 10 20 ... 100    to 0% 10% 20% .... 100%
                                           - In Splines & Fill section: Increased maximum spline width from 1-4 to 1-6.
                                           - Changed "Check/Uncheck" Splines to "Check/Uncheck" Splines/fill points
                                            - New font commands (color):    [Rf] (Red font)    [Bf] (Blue font) [Gf] (Green font)   [Wf] (White font [Yf]    (Yellow font)       [Ff] (Fuchsia font)      [Cf] (Cyan font)
                    - Styles font commands:    [tf] (thick font)    [if] (italic font) [uf] (underlined font)
                                             Also added a total of 17 new commands to allow changes (from default) to other symbol types, colors and sizes in the same data set.
                                              - Symbol change           - [1s] (circle)    [2s] (square)    [3s] (diamond)      [4s] (triangle) [5s] (cross)      [6s]   (ring/hollow circle)
                                                - Symbol color change -    [Ws] (White)        [Rs] (Red)       [Gs] (Green)     [Bs]    (Blue) [Ys] (Yellow) [Fs] Fuchsia    [Cs] (Cyan)    [BS] (Black Symbol)
                        - Symbol size change    -    [ss]    (small symbol)       [ms] (medium symbol)          [bs] (big symbol)

CHEMIX School 8.00 (released 2020-5-21)

New v8.00 YouTube video Tutorials

width="480" height="360"

- Added a Data Logger (Curve Fit - Function Plot - Data Logger) : In this CHEMIX School version, a serial port data logger has been added. The purpose of this new addition is
to be able to acquire and view serial data collected from micro controllers such as Arduino.
                                            - Added Plot of vertical lines XiYi to Xi(Yi=0) to the Interpolation & Curve Fit drop down list. Suited for visualization of data acquisitions from e.g. Geiger-counters.
                                            - Added Initialize to default button. --> All settings to startup conditions.
                                            - MAX number data points has been increased from 400 to 1000 .
   - Added Sort & Swap: Sort X-data from low to high or swap X <-> Y.
                                                         - 0%-2%-5% Additional space before/after and above/beneath XY Max & Min values.
                                                                                                               - Added Save as *.CSV    (comma-separated values)
                                                                                                               - It is now possible to see the total number of XY pairs in a data set.
                                                                                        Standard logging (default): Receive X Y data
                                                                                                               1) Stops logging automatically after a selected number of data points (Max 1000pts).
                                 2) Possibility to keep track of up to 1000 of the Last log points . When a selected number (e.g. 1000 pts.) of logged
data points has been reached, (X,Y)-1 will be replaced by (X,Y)-2 and (X,Y)-2 will be replaced by (X,Y)-3
   and so on . ( Replace old points after ### points)
                                                                                                    Each second the logger will read and present available serial data. If log-data is received, the data will be copied to the data-edit field
                                                                                                    and automatically plotted.
                                                                                                    NOTE: To receive a big list of XY data (limited to <= 1000 X Y pairs), use "Standard logging" (advanced logging unchecked) and
                                                                                                                  the logger will once a second read, collect and present as much data as possible dependent of the baud rate.
                                                                                                    Advanced options (checked):
                                                                                                                   Conditional statement (options):
Log if   | Y(i)-Y(i-1) | >=    | c |       Log only if    | Y(i)-Y(i-1) | >=    | c |
      Log if Y(i)    !=     c                          Log only if Y(i)    !=   c
Stop if Y(i)    > =     c         Logging will be stopped if     Y(i)    > =     c
                                                                                                                                Stop if Y(i)    < =     c                   Logging will be stopped if     Y(i)    < =     c
Red Alert if Y(i)   >= c                 Entire plot area will go from white to red if Y(i)   >= c
Red Alert if Y(i)   <= c                 Entire plot area will go from white to red if Y(i)   <= c
                                                                                                        Operators - meaning: | c | absolute value,    <=    less than or equal to,     >=   greater than or equal to ,     !=   not equal to
                                                                                                                              Audio - (Red Alert) : In combination with the visual Red Alert, an audio signal (default 2 signals 2 seconds apart)
can be heard. This can be turned off or changed from Settings in the File menu.




- Ternary Plot: Added - In Legend & Size: Added options.
                                                   - Sizing of legend symbols.
                                                       - Symbols can now be replaced by a colored rectangular area representing the fill colors in the ternary diagram.
   - Legend frame On/Off
                                         - Increased triangular plot area.
                                         - Angled arrows and selectable arrow width
                                         - View coordinates (On/Off). It is now possible to interactively view the triangular ABC-coordinates when moving the mouse pointer.
                             - 'Initialize' button. --> All settings to startup conditions (default).
                                         - Added Save as *.CSV    (comma-separated values)
       -Scale number sizing by 4 radio buttons
                            - Symbol sizing by 4 radio buttons.
                                        - Spline with by 4 radio buttons
                                        - Frame with by 4 radio buttons
      - Increased the number of allowed data points from a max 6 data sets * 400 = 2400 Points to 6 data sets *1000 = 6000 Points

- Periodic Table:          A complete redesign. Added many new features such as framing of groups/blocks and color scaling of properties etc.

- Binary Plot: Added   -Selectable:
                                                        - XY-scale ,X-scale , Y-scale or XY-scale Off.
                                                        - Frame: Full frame , L-frame or _ frame.
                                                   - Sizing of legend symbols.
                                                       - Symbols can now be replaced by a colored rectangular area representing the fill colors in the binary diagram.
   - Legend frame On/Off
                                        - In generate plot, added option to manually insert the wanted number of generated points.
                                         - Increased rectangular plot area.
                                         - Initialize to default button. --> All setting to default startup conditions.
                                         - 0%-2%-5% space before first and after last plot point.
   - Increased number of allowed data points from a max 6 data sets * 400 = 2400 DP to 6 data sets *1000 = 6000 DP

CHEMIX School 7.00 (released 2017-8-21)
- Ternary Plot: Added AB,AC,BC selectable and movable bivariate cross plots. Also added font size options and other options for scaling, title, axis text and angled axis text.
- Thermochemistry: Added more than 1000 new compounds at Standard Ambient Temperature and pressure (satp).
               Added Standard Ambient Temperature and Pressure abbreviation (satp) as a state symbol alternative.
                 Assuming (satp) conditions, it is now possible to calculate thermochemical equations without adding state symbols to compounds (species).
- Binary Plot: Added Unsorted Polylines.
- Periodic Table: Added colors and color codes for groups and element states.

CHEMIX School 6.00 (released 2017-6-26)
- Added: Search Inorganic Compounds - physical properties/constants. Search thousands of inorganic compounds offline.
- Added: Extended 0% and 100% scaling in Ternary plot. Added 20% scaling step intervals. Added "huge" and "gigantic" font. Added templates.
- Added: Condensed (semi-structural) formula input option e.g. CH3-CH2-CH2-CH3 for Molecular Calculator, Balance chemical equation etc.

CHEMIX School 5.00 (released 2017-5-26)
- Added: Solubility curve plotter and a temperature/solubility Calculator
- Added: Temperature/solubility plot-data for common inorganic compounds.
- Added: Angled axis text to Ternary Plot functionality

CHEMIX School 4.50 (released 2017-4-4)
- Minor cosmetic updates

CHEMIX School 4.00 (released 2016-4-25)
- Added a Concentration & Dilution Calculator

CHEMIX School 3.60 released (2012-7-4)
- Minor Update
- For maximal versatility/portability - CHEMIX School will from now on be downloaded as a ZIP containing the actual and final file/folder
structure and not (any longer) as a registry modifying executable installation file.
- CHEMIX School can from now on be stored on "installed on" and executed from zip drives etc., which is very convenient from a productivity standpoint of view.

CHEMIX School 3.51 released (2010-2-11)
- Modified for Windows 7 compatibility

CHEMIX School 3.50 released (2008-2-13)
- Added a binary phase diagram plotter. Added fill colors , spline colors, colored symbols, movable legend box, selectable legend box symbols
to ternary phase diagram plotter. Added print and copy to clipboard to molecular 3-D viewer.

CHEMIX School 1.0 - 3.50 (Internet release 1998 - 2008)
- Molecular Calculator
- Periodic Table
- Balance chemical equations
- Thermochemical equation balancer
- Electrochemistry
- Weak acid/base
- Solubility product
- Solubility chart
- Curve Fit & Function Plot
- Ternary Plot
- Binary Plot
- Molecular 3-D Viewer
- Gas Equations
- Conversions
- Dictionary
- Calculator
- IR/MS/NMR Spectroscopy

1995    Cont. development using C/C++

1993 Start - The first few CHEMIX School code lines written in C language

CHEMIX School - The Author: Arne Standnes ,Bergen, Norway

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