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Examples of Strong and Weak Acids and Bases and Buffers

This solution is an answer to finding the pH of a solution if it is either a strong acid/base or a weak acid/base or a buffer containing a weak acid and its conjugate or weak base and it's conjugate.

1.
a) Give examples of strong acids and bases.
b) find the pH of 0.01 M and 0.001 M solution
of each.

2.
a) Give examples of weak acids and bases.
b) find the pH of 0.01 M solution
of each.

3.
a) Give examples for a buffer solution containing weak acid and its conjugate.
b) find the pH of solution containing equal amounts of each. Find the pH when the
concentration of the conjugate base is 1000 time that of the acid.

Solution Preview

1.
a) An example of a strong acid is HCl (hydrochloric acid). An example of a strong base is
NaOH (sodium hydroxide).
b) To find the pH of a strong acid , you just need to find out -log[H+] where [H+] is the hydrogen ion concentration.
For strong acids, since they dissociate completely, [H+] = concentration of the acid. Therefore for 0.01M HCl,
pH= -log(0.01) =2. For 0.001 M solution, pH= -log(0.001), which ...

Solution Summary

Examples of strong and weak acids and bases and buffers are provided. The expert finds the pH when the concentration of conjugate bases is an acid.

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