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

question 48

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

---

Definitions:

Evaluative

Involving value judgments, as opposed to simply being descriptive.

Basic

Constituting an essential foundation or starting point; fundamental characteristics or principles of something.

Pythagoras

An ancient Greek philosopher and mathematician who is credited with significant developments in mathematics, astronomy, and the theory of music.

Numbers

Abstract entities that represent quantities, positions, or values in mathematics, enabling the measuring, labeling, and ordering of objects and ideas.