Question

Consider the acids

HCl

HNO3

H2SO4

HF

CH3COOH

NH4Cl.

[Additional information: Keq for the dissociation of ammonium ion is 5.6 × 10–10].

Which of the acids are weak?

Which of the acids are strong?

Suppose you have six beakers, each containing 1.0 M solutions of the acids in Problem 15.70. Which solution will have the highest concentration of H3O+ ions? Explain how you knew.

Answer 1

The weakest acid will be the base the salt of an acid and base = NH4Cl

the other weak acids are = HF, CH3COOH [they are weak as they dissociate upto less extent in water]

The strong acid are = HCl, HNO3, H2SO4

Among the given acids the dissociation constant of strong acids are more as compared to weak acids.

Due to high dissociation constant they give maximum cocnentration of hydronium ions.

all the three acids (HCL , HNO3 and H2SO4) will give equal concentration of H3O+ ions in 1 M solution as they all are strong acid and will dissociate completely.