A laboratory stores four solutions of strong acids and bases at : • Solution I: •…
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A laboratory stores four 0.0100M solutions of strong acids and bases at 25∘C:
• Solution I: HClO4
• Solution II: H2SO4 (assume diprotic, fully strong)
• Solution III: NaOH
• Solution IV: Ca(OH)2
Each solute dissociates completely into its ions.
(a) For each solution, determine the molar concentration of hydronium or hydroxide ions present, taking stoichiometric factors into account.
(b) Calculate the pH of each solution to two significant figures.
(c) Rank the four solutions from strongest acid to strongest base, clearly indicating the relative positions of solutions that share the same qualitative classification (acidic or basic).
(d) Discuss how the polyprotic or polyhydroxide nature of the solutes affects the quantitative pH differences among solutions prepared at the same formal molarity.