Consider the Titration of 200

question 93

Multiple Choice

Consider the titration of 200.0 mL of a 0.100 M solution of the weak acid H₂A with 0.200 M NaOH. The first equivalence point is reached after 100.0 mL of 0.200 M NaOH has been added, and the pH is 6.27. The pH after 65.0 mL of 0.200 M NaOH has been added, the pH is 4.95.Calculate the value of K_a2 for H₂A.

• A) 5.37 × 10^-7
• B) 2.10 × 10^-5
• C) 1.12 × 10^-5
• D) 1.40 × 10^-8
• E) none of these

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Definitions:

Contraries

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In logic, a statement formed by negating both the hypothesis and conclusion of the converse of a conditional statement and then reversing them.

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A statement that expresses a judgment or opinion that can be either true or false.

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The manner by which two or more ideas, items, or individuals are linked together, or the condition of being linked.