Question

Acetic acid has an acid ionization constant (Ka) of ____.

A) 2.4 x 10⁻⁶
B) 5.2 x 10⁻⁷
C) 1.8 x 10⁻⁵
D) 3.6 x 10⁻⁴

Answer 1

The acid ionization constant (Ka) of acetic acid is 1.8 x 10⁻⁵, which indicates it is a weak acid with limited ionization in solution.

Step-by-step explanation:

The acid ionization constant (Ka) of acetic acid is 1.8 x 10⁻⁵. Therefore, the correct answer is C) 1.8 x 10⁻⁵. The Ka value indicates the strength of an acid in solution; the higher the Ka, the stronger the acid. In this case, acetic acid is a weak acid with a fairly low Ka value, implying limited ionization in aqueous solutions.