Question

what is the molarity of a sodium hydroxide solution if 26.0mL of the solution os titrated to the end point with 57.5mL of a 0.500M hydrochloric acid solution

Answer 1

mols HCl = mols x L = ?

mols NaOH = mols HCl (write the equation and you will see it is 1 mol HCl for 1 mol NaOH).
Then M NaOH = mols NaOH/L NaOH