HZ Is a Weak Acid

question 29

Multiple Choice

HZ is a weak acid. An aqueous solution of HZ is prepared by dissolving 0.020 mol of HZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 4.93 at 25.0°C. The K_a of HZ is __________.

• A)1.2 × 10^-5
• B)6.9 × 10^-9
• C)1.4 × 10^-10
• D)9.9 × 10^-2
• E)2.8 × 10^-12

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The divergence of political attitudes to ideological extremes, leading to a significant divide between political parties, often resulting in gridlock.

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