How many milliliters of 4.00M NaOH wll react with 100 mL of 0.312 M H2SO4?
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
mols H2SO4 = M x L = ?
mols Na0H = twice mols H2SO4 (look at the coefficients in the balanced equation).
M NaOH = mols NaOH/L NaOH. YOu know M and mols, solve for L and convert to mL.