**a. Percent By Mass**

b. Percent by Volume

c. Mass-Volume Percent

Above three modules calculate the concentrations of solutions, in both percent and parts by million (PPM) by mass, by volume, or mass-volume percent and PPM; or calculate the amount of solute or solvent by knowing percent and either solvent or solute.

**d. Molarity**

This module is to calculate the molarity of a solution by known the moles of the solute directly or indirectly, and the volume of the solution; or calculate either the moles of the solute or the volume of the solution by known the molarity and the other quantity.

**e. Molality**

This module is to calculate the molality of a solution by known the moles of the solute directly or indirectly, and the mass of the solvent; or calculate either the moles of the solute or the mass of the solvent by known the molality and the other quantity.

**f. Dilution**

This module is to compute the one quantity appearing the following formulae by knowing other quantities.

Ms x Vs = Md x Vd , or

(M1 x V1) + (M2 x V2) = Md x Vd

**g. Solution Stoichiometry**

This module studies the quantitative relationships of a reaction of reactants and products including solutions.

This module provides step-wise solutions in the quantitative relationships of a reaction including solutions.

h. Boiling-Point Elevation/Freezing-Point Depression

This module calculates Boiling-Point Elevation or Freezing-Point Depression of a solution by given its molality; or calculate the molecular weight or mass of the solute in the solution by giving Boiling-Point Elevation or Freezing-Point Depression of a solution.