25
QuizMultiple Choice

Lab: Measuring pH — Unit test

Question 25 • Foothill-B Period-Chemistry-26/27B

Which statement correctly describes the Ka of a weak acid?

Answer
A
The Ka is large, and the equilibrium favors products.
B
The Ka is large, and the equilibrium favors reactants.
C
The Ka is small, and the equilibrium favors products.
D
The Ka is small, and the equilibrium favors reactants.

Explanation

A weak acid ionizes only partially in water, so its equilibrium lies mostly toward the un-ionized acid and reactants. Its acid dissociation constant, Ka, is therefore small. The correct statement is that the Ka is small and the equilibrium favors reactants.

AI-written and checked against the verified answer.

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