Demonstrate that the hydroxide ion concentration in a saturated calcium hydroxide solution is $0.0224\ \text{mol dm}^{-3}$ at $298\ \text{K}$.
Using the data in (i), determine the solubility product, $K_{sp}$, for calcium hydroxide at $298\ \text{K}$. Your response should include the units for $K_{sp}$.
A spatulaful of solid calcium chloride is mixed into a sample of saturated calcium hydroxide solution. Every bit of the calcium chloride dissolves. State one further observation that would be seen and give an estimated pH for the solution produced. Explain both responses.
Calcium hydroxide reacts with dilute sulfuric acid to give calcium sulfate, and barium hydroxide reacts in the same general way to form barium sulfate. Explain why calcium sulfate dissolves in water more readily than barium sulfate.
Write an equation for calcium reacting with $\text{CH}_3\text{COOH}$.
Use molecular and ionic formulae to pick out two conjugate acid-base pairs in mixture D. Pair 1 must contain organic species.
Write the expression for $K_a$ of $\text{CH}_3\text{COOH}$.
Mixture D contains $0.394\ \text{mol dm}^{-3}$ calcium ethanoate, $(\text{CH}_3\text{COO})_2\text{Ca}$. Its $\text{CH}_3\text{COOH}$ concentration is $0.270\ \text{mol dm}^{-3}$. The $K_a$ for $\text{CH}_3\text{COOH}$ is $1.74 \times 10^{-5}\ \text{mol dm}^{-3}$ at $298\ \text{K}$. Calculate the pH of mixture D.
Write two equations to show the buffer behaviour of mixture D.