Answer to Question #114593 in General Chemistry for Nicolas

Question

Using 2 ml of 19 M NaOH, calculate the volume of water necessary to create a 0.25 M
solution of NaOH. What is the final volume of the solution

Answer 1

C₁(NaOH) = 19 M;

C₂(NaOH) = 0.25 M;

V₁ = 2 ml;

V₂ = unknown.

Proportion 1:

19 moles — 1000 ml

x moles — 2 ml

x = 0.038 moles in 2 ml of 19 M NaOH;

Proportion 2:

0.25 moles — 1000 (ml)

0.038 moles — y (ml)

y = 152 ml (final volume of the solution);

V(H₂O) = 152 ml — 2 ml = 150 ml;

Answer: V(H₂O) = 150 ml; V(final) = 152 ml