Answer to Question #108475 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 40.0 mL of concentrated (11.6 M ) HCl to a final volume of 500.0 mL?

Answer 1

V₁(HCl)=40 mL=0.04L;

C₁(HCl)= 11.6 M;

V₂(HCl)=500 mL=0.5L;

C₂(HCl) - ?

HCl -->H⁺ + Cl^-

V₁*C₁=V₂*C₂;

C₂(HCl)=V₁*C₁/V₂ = 0.04*11.6/0.5=0.928 M;

C₂(HCl)=C(H⁺)=0.928 mol/L;

Answer: the concentration of H+ ions in a solution is 0.928 mol/L.