Given 5 moles of H2SO4 react with excess NaOH how many moles of water are produced? NaOH + H2SO4 --> H2O + Na2SO4 (equation is unbalanced!) Solution Balanced equation: 2 NaOH + H 2 SO 4 ====> 2 H 2 O + Na 2 SO 4 Reaction type: double replacement Moles of H2SO4 = 5 Moles Moles of H2O produced = 10 Moles One mole of H2SO4 will react two moles of NaOH to produced one mole of sodium sulfate and 2 moles of water. Hence  5 moles of H2SO4 will produce 10 Moles of water. .