Formic Acid, Which Is a Component of Insect Venom, Has

question 31

Multiple Choice

Formic acid, which is a component of insect venom, has a K_a = 1.8 × 10^-4. What is the [H₃O⁺] in a solution that is initially 0.10 M formic acid, HCOOH?

• A) 4.2 × 10^-3 M
• B) 8.4 × 10^-3 M
• C) 1.8 × 10^-4 M
• D) 1.8 × 10^-5 M
• E) 1.8 × 10^-6 M

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