n unknown amount of water is mixed with

Question

350 mL of a 6 M solution of NaOH solution.
A 75 mL sample of the resulting solution is
titrated to neutrality with 52
.
5 mL of 6 M
HCl. Calculate the concentration of the di-
luted NaOH solution.
Answer in units of M

Answer 1

mols HCl = M x L = ?
mols NaOH = mols HCl (look at the coefficients in the balanced chemical equation).
M NaOH = mols NaOH/L NaOH
You know mols and L, solve for M. L for NaOH is 0.075 since you want M of the diluted solution.