CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Two separate beakers each contain 250mL of a clear, colorless solution at 25°C. One beaker holds 0.0500M NaOH, and the other holds 0.0500MCa(OH)2.
(1) Part 1: Qualitatively compare the hydroxide ion concentrations in the two beakers, providing a chemical justification for your comparison.
(2) Part 2: Predict which solution has the smaller pOH and explain your reasoning.
(3) Part 3: Without performing full numerical calculations, outline the sequential steps you would follow to determine the exact pH of each solution, clearly indicating any assumptions and conversions required.