Answer to Question #108476 in General Chemistry for Beverlie

Question

1. What is the concentration of H+ ions in a solution of hydrochloric acid that was prepared by diluting 10.0 mL of concentrated (11.6 M ) HCl to a final volume of 500.0 mL? answer in M

Answer 1

C_o(HCl) = 11.6 M;

V₁ = 10.0 mL;

V₂ = 500.0 mL.

Solution:

Let's find a new concentration of hydrochloric acid (HCl) after dilution:

[HCl] = C_o(HCl) * (V₁ / V₂) = 11.6 M * (10.0 mL / 500.0 mL) = 0.232 M.

HCl is a strong acid in aqueous media therefore it ionizes 100%.

HCl = H⁺ + Cl^-

This means that

[H⁺] = [HCl] = 0.232 M.

[H⁺] = 0.232 M.

Answer: 0.232 M is the concentration of H⁺ ions in a solution of HCl.