What Is the [H₃O⁺] in a Buffer That Consists of 0.30

question 35

Multiple Choice

What is the [H₃O⁺] in a buffer that consists of 0.30 M HCOOH and 0.20 M HCOONa? [K_a(HCOOH) = 1.7 × 10^-4]

• A)1.1 × 10^-4 M
• B)2.6 × 10^-4 M
• C)4.3 × 10^-4 M
• D)6.7 × 10^-5 M
• E)1.7 × 10^-4 M

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