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

Comprehend the significance of direct and vigorous sentences through the use of active voice.

Recognize and avoid outdated phrases in business messages.

Implement a conversational tone in most business messages.

Understand the structure of sentences (simple, compound, complex, compound-complex) and their appropriateness in business communication.

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