When heated, elemental phosphorus, P4, produces phosphine, PH3, and phosphoric acid, H3PO4. How many grams of phosphine are produced if 56 grams of P4 have react
Do you add Water?
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To determine the number of grams of phosphine, PH3, produced when 56 grams of P4 react, you first need to balance the chemical equation for the reaction. The balanced equation is as follows:
P4 + 5O2 → 2PH3 + 2H3PO4
According to this equation, 1 mole of P4 reacts to produce 2 moles of PH3. To find the number of moles of P4, you can use the molar mass of P4, which is 123.9 grams/mole.
56 grams of P4 is equal to 56 grams / 123.9 grams/mole = 0.452 moles of P4.
Since the molar ratio of PH3 to P4 is 2:1, the number of moles of PH3 produced is half that of P4, which is 0.452 moles / 2 = 0.226 moles of PH3.
To find the mass of PH3, you need to multiply the number of moles by the molar mass of PH3, which is 33.997 grams/mole.
Mass of PH3 = 0.226 moles x 33.997 grams/mole = 7.709 grams of PH3.
Therefore, 56 grams of P4 will produce 7.709 grams of PH3.
Write and balance the equation.
Convert grams P4 to mols. mols = grams/molar mass.
Use the coefficients in the balanced equation to convert mols P4 to mols PH3.
Convert mols PH3 to g PH3. g = mols x molar mass.