A 25.0 mL sample of 0.200 M ethanoic acid (CH COOH) is titrated at 25 °C with 0.150 M…
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A 25.0 mL sample of 0.200 M ethanoic acid (CH3COOH) is titrated at 25 °C with 0.150 M aqueous sodium hydroxide. After 10.0 mL of the sodium hydroxide solution has been added, the temperature has remained constant at 25 °C. The acid dissociation constant for ethanoic acid at this temperature is Ka=1.8×10−5. Assume that volumes are additive.
(a) Calculate the number of moles of ethanoic acid and the number of moles of sodium hydroxide present before any reaction occurs.
(b) Determine the number of moles of each chemical species present after the acid–base reaction is complete.
(c) Calculate the pH of the resulting solution.