a. Interconversion

This module calculates any of three values: pH, pOH, [H⁺] and [OH^-], if any one of them is known.

b. Weak Acid/Base Dissociation

This module can perform the following calculations:

• Known initial concentration of a weak acid and Ka, calculate percent dissociation and pH.
• Known initial concentration of a weak acid and percent dissociation, calculate Ka and pH.
• Known initial concentration of a weak base and Kb, calculate pH.

c. Weak Acids Mixture

This module calculates the pH of a solution containing two weak acids of very different strengths.

d. Salt Producing Basic Solutions

This module calculates the pH of the salts that produce basic solutions.

e. Salt Producing Basic Solutions

This module calculates the pH of the salts that produce acidic solutions.

f. Buffered Solutions (Acid/Salt) and pH Changes

This module calculates the pH of buffered solutions and the pH changes in the solution when a strong base is added.

g. Buffered Solutions (Base/Salt) and pH Changes

This module calculates the pH of buffered solutions and the pH changes in the solution when a strong acid is added.

Titration and pH Curvers

h. Strong Acid-Strong Base

i. Weak Acid-Strong Base

j. Strong Acid-Weak Base

These three modules are for three types of titrations. By choosing a titrant of known concentration and an unknown solution, the key numbers (initial pH, pH at the equilibrium point and the volume needed to get the equilibrium) and pH curves can be calculated.