Question

15.00mL sample of a solution of H2SO4 of unknown concentration was titrated with 0.3200 N NaOH. The titration required 21.30mL of the base.
What was the normality of the acid solution?
what was the molarity of the acid solution?

Answer 1

H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
mols NaOH = M x L = ? (Note: the M and N of NaOH are the same.)
Using the coefficients in the balanced equation, convert mols NaOH to mols H2SO4. That will be mols H2SO4 = 1/2 mols NaOH.
Then M H2SO4 = mols H2SO4/L H2SO4 = ?

To convert to N,
N = M*#H titrated. #H in this case is 2 so N = M*2