Question

Determine the starting mass of each reactant if 63.1 g of K₃PO₄ is produced and 83.3 g of H₃PO₄ remains unreacted?

Answer 1

To determine the starting mass of each reactant, you can use the concept of limiting reactants. By calculating the number of moles of H3PO4 produced and the number of moles of H3PO4 that remained unreacted, you can then calculate the starting mass of P4O6 and H2O.

Step-by-step explanation:

To determine the starting mass of each reactant, we need to use the concept of limiting reactants. From the given balanced equation, we can see that 1 mole of P4O6 reacts with 6 moles of H2O to produce 4 moles of H3PO4.

rst, we calculate the number of moles of H3PO4 produced:

63.1 g K3PO4 * (1 mol K3PO4 / molar mass of K3PO4) * (4 mol H3PO4 / 1 mol K3PO4) = X mol H3PO4

Next, we calculate the number of moles of H3PO4 that remained unreacted:

83.3 g H3PO4 * (1 mol H3PO4 / molar mass of H3PO4) = Y mol H3PO4

Finally, we calculate the starting mass of each reactant:

Starting mass of P4O6 = X mol H3PO4 * (1 mol P4O6 / 4 mol H3PO4) * (molar mass of P4O6 / 1 mol P4O6)

Starting mass of H2O = 6 * X mol H3PO4 * (1 mol H2O / 4 mol H3PO4) * (molar mass of H2O / 1 mol H2O)