A 1000-ML Sample of 0 $\times$ 10^-10
B)4 $\times$ 10^-5
D)not Enough Information to Calculate
E)none of These

question 10

Multiple Choice

A 100.0-mL sample of 0.503 M H₂A (diprotic acid) is titrated with 0.200 M NaOH.After 125.0 mL of 0.200 M NaOH has been added,the pH of the solution is 4.50.Calculate K_a1 for H₂A.

• A)3.2 \(\times\) 10^-10
• B)4.5
• C)3.1 \(\times\) 10^-5
• D)not enough information to calculate
• E)none of these

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