Question

Consider the following balanced chemical equation: 3NaOH + H3PO4 + - Na3PO4 + 3H20 How many moles of Na3PO4 are produced when 5.0 moles of sodium hydroxide reacts with excess H3PO4? O A. 1.0 moles OB. 0.6 moles O C. 1.7 moles O D. 3.3 moles O E. 4.0 moles

Answer 1

NaOH is the limiting reagent here as H₃PO₄ is said to be present in excess.

By the equation,

3 moles of NaOH produces 1 mole Na₃PO₄

Therefore 5 moles of NaOH would react to give (1 / 3) x 5 moles Na₃PO₄ = 1.7 moles

Therefore answer is 1.7 moles.