## Calculate Solubility

Calculate solubility
Solubility is about how much of a substance that can be dissolved in a solvent forming a homogeneous mixture of only one phase.
The solubility of a substance is temperature dependant - normally a substance dissolves better in high temperatures.  Typical solubility concentrations used are :   grams of solute per kg of solvent ,  g/(dL solvent) , molarity etc. A solvent (solute) is a substance dissolved in another substance.

Example: g/Kg

Question: 1.599 grams of LiF will dissolve in 1 kg of water. Calculate solubility.

Answer:  The solubility of LiF is 1.599g/(kg solvent)

Example: mol/Kg to g/Kg

Question: 0.06164 moles of LiF will dissolve in 1 kg of water. Calculate solubility

FW LiF = 6.94 + 19.0  =  25.94 g/mol

Answer:  The solubility of LiF is   0.06164mol * 25.94g/mol = 1.599g/(kg solvent)

Example: Ksp to mol/Kg to g/Kg

The solubility product Ksp of LiF = 0.0038  Calculate solubility

The expression for the solubility product: Ksp=[Li] [F]

[Li,F] = (Ksp)^0.5 =  0.0038^0.5 = 0.06164mol       FW  LiF = 6.94 + 19.0 = 25.94 g/mol

Answer:  The solubility of LiF is   0.06164mol * 25.94g/mol = 1.599g/(kg solvent)

Chemistry Software - Home