What Is the [HPO₄^-2] of a Solution Labeled "0

question 74

Multiple Choice

What is the [HPO₄^-2] of a solution labeled "0.10 M phosphoric acid"?
[K_a1 = 7.1 × 10^-3;K_a2 = 6.3 × 10^-8;K_a3 = 4.2 × 10^-13]

• A)4.2 × 10^-13 M
• B)6.3 × 10^-8 M
• C)7.1 × 10^-3 M
• D)1.6 × 10^-9 M
• E)1.6 × 10^-16 M

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