Percent ionization for a weak acid (HA) is determined by the following formula:
Percent ionization=[HA] ionized / [HA] initial × 100%
For strong acids, ionization is nearly complete (100%) at most concentrations. However, for weak acids, the percent ionization changes significantly with concentration. The more diluted the acid is, the greater percent ionization.
A certain weak acid, HA, has a Ka value of 7.6×10 −7.
A) Calculate the percent ionization of HA in a 0.10 M solution. Express your answer as a percent using two significant figures.
B) Calculate the percent ionization of HA in a 0.010 M solution. Express your answer as a percent using two significant figures.
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