Formic Acid,which Is a Component of Some Insect Venoms,has a K_a

question 120

Multiple Choice

Formic acid,which is a component of some insect venoms,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