If the 12.5ml of NaOH solution is required to react completely with 0.300g of KHP (Potassium Hydrogen Phthalate, 204.2g/mol). What is the molarity of NaOH?

Answer 1

NaOH + KHP ==> NaKP + H2O
mols KHP = grams/molar mass
mols NaOH = mols KHP (look at the coefficients in the balanced equation.)
M NaOH = mols NaOH/L NaOH