Four unlabeled 1.0 L aqueous solutions—A, B, C

CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Four unlabeled 1.0 L aqueous solutions—A, B, C, and D—are known to contain only a single strong acid or strong base. • Solution A: 0.010 M0.010\,\text{M} HNO3\text{HNO}_3 • Solution B: pOH=2.00\text{pOH}=2.00 • Solution C: 0.020 M0.020\,\text{M} Ca(OH)2\text{Ca(OH)}_2 • Solution D: pH=7.20\text{pH}=7.20 Assume the temperature is 25 ∘C25\,^{\circ}\text{C} and that each solute dissociates completely. (a) Rank the four solutions from most acidic to most basic. (b) Explain your ranking by referring explicitly to the relative magnitudes of [H3O+][H_3O^+] and [OH−][OH^-] in each solution.

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