Equal volumes of 0.100 M hydrofluoric acid and 0.0500 M calcium hydroxide solutions…
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Equal volumes of 0.100 M hydrofluoric acid and 0.0500 M calcium hydroxide solutions are combined in a beaker at 25 °C. The acid–base reaction proceeds to completion under these conditions.
(a) Write the balanced molecular equation for the reaction, including phase labels.
(b) Write the net ionic equation for the reaction, clearly indicating any species that remain unionized in solution.
(c) Explain why one of the reactants is represented as an intact molecule rather than as dissociated ions in the net ionic equation.
(d) Determine the molar concentration of fluoride ions remaining in the final solution after the reaction has gone to completion. Assume additive volumes.