Question

How many milliliters of 0.205 M NaOH solution are needed to completely neutralize 5.50 mL of 0.865 M H2SO4 solution?

Answer 1

2NaOH + H2SO4 ==> Na2SO4 + 2H2O

mols H2SO4 = M x L = ?
Using the coefficients in the balanced equation, convert mols H2SO4 to mols NaOH. That's mols H2SO4 x (2 mols NaOH/1 ml H2SO4) = ?
Then M NaOH = mols NaOH/L NaOH. YOu know M NaOH and mols NaOH, solve for L NaOH and convert to mL.

Answer 2

50ml