How many grams of phosphoric acid are required to react with 25.4 g of sodium hydroxide?

The balanced chemical equation for the reaction is:

3 H3PO4 + 2 NaOH -> Na3PO4 + 3 H2O

From the equation, we can see that 3 moles of H3PO4 react with 2 moles of NaOH.

Calculate the molar mass of H3PO4 and NaOH.

Then, use the molar ratio from the balanced equation to calculate the amount of H3PO4 needed to react with 25.4g of NaOH.