ACT Science Practice Question #1478 (Medium (32)) | Test Citadel
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ACT Science Difficulty: Medium (32)

Digital ACT Science Practice Question #1478

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

A student titrates 25.0 mL of 0.10 M acetic acid (CH3COOH) with 0.10 M NaOH. The pH measurements are recorded: - 0.0 mL NaOH added: pH = 2.87 - 12.5 mL NaOH added: pH = 4.76 - 25.0 mL NaOH added: pH = 8.72 - 30.0 mL NaOH added: pH = 11.96 Which of the following statements about the titration is supported by the data?
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Half-equivalence point is exactly half the equivalence volume (12.5 mL out of 25.0 mL).

Masterclass Solution & Distractor Trap Analysis

At 12.5 mL (half of the 25.0 mL equivalence volume), [CH3COOH] = [CH3COO-] and pH = pKa = 4.76....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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