In a titration experiment involving an unknown concentration of HCl and a 0.100M solution of NaOH(aq), it was determined that it took 12.5mL of NaOH to neutralize 20.0mL of the HCl(aq). Write a balanced chemical equation for this reaction and determine the concentration of the HCl(aq).

Answer 1

HCl + NaOH ==> NaCl + H2O
mols NaOH = M x L = ?
mols HCl = mols NaOH and you know that from the 1:1 ratio in the balanced equation.
Then M HCl = mols HCl/L HCl.