A 45-mL sample of H-Cl with an unknown content was used to titrate Na-OH. One mole of phosphoric acid requires three moles of sodium hydroxide to neutralize it.
Three moles of sodium hydroxide are required for every mole of phosphoric acid. The balanced equation reveals the following: 1 mol of H3PO4 and 3 mol of NaOH react chemically. The balanced equation makes it abundantly evident that 2 moles of NaOH react with 1 mole of sulphuric acid to produce the desired products. Number of moles of solute/volume of solution in lit. = 2 moles of Na-OH are needed to thoroughly react with 1.00 mole of sulfuric acid. Therefore, 10g of Na-OH should be used to create a 500 mL 0.5 M solution.
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