Question

HCl (aq) + H2O (l) → H₃O⁺ (aq) + Cl⁻ (aq)

A weak acid reaction with water would be an equilibrium reaction.
HF (aq) + H2O (l) ⇌ H₃O⁺ (aq) + F⁻ (aq)
What is the equilibrium expression for HF in water?
a) [H₃O⁺][F⁻] / [HF]
b) [HF] / [H₃O⁺][F⁻]
c) [H₃O⁺][F⁻] × [HF]
d) [HF] × [H₃O⁺][F⁻]

Answer 1

The equilibrium expression for the reaction of HF with water is [HF] / [H₃O⁺][F⁻].

Step-by-step explanation:

The equilibrium expression for the reaction of HF with water is:

b) [HF] / [H₃O⁺][F⁻]

This expression represents the ratio of the concentration of HF to the product of the concentrations of H₃O⁺ and F⁻ ions in the solution. The square brackets ([ ]) denote the concentration of each species.