if 62.3 g of zinc react with hydrophosphoric acid (H3PO4) it produces zinc (I) phosphate and hydrogen. how much zinc (I) phosphate is produced?
To find out how much zinc(I) phosphate is produced when 62.3 g of zinc reacts with hydrophosphoric acid (H3PO4), we first need to determine the balanced chemical equation for the reaction.
The balanced chemical equation for the reaction between zinc and hydrophosphoric acid is as follows:
Zn + H3PO4 → Zn3(PO4)2 + H2
From the balanced equation, we can see that 1 mole of zinc (Zn) reacts with 1 mole of hydrophosphoric acid (H3PO4) to produce 1 mole of zinc(I) phosphate (Zn3(PO4)2) and 1 mole of hydrogen gas (H2).
Next, we need to calculate the number of moles of zinc (Zn) in 62.3 g using its molar mass. The molar mass of zinc (Zn) is approximately 65.38 g/mol.
Number of moles of zinc (Zn) = Mass of zinc (Zn) / Molar mass of zinc (Zn)
= 62.3 g / 65.38 g/mol
≈ 0.952 mol
Since the stoichiometry of the reaction indicates that 1 mole of zinc (Zn) produces 1 mole of zinc(I) phosphate (Zn3(PO4)2), the number of moles of zinc(I) phosphate (Zn3(PO4)2) produced is also 0.952 mol.
Finally, to determine the mass of zinc(I) phosphate (Zn3(PO4)2) produced, we use its molar mass. The molar mass of zinc(I) phosphate (Zn3(PO4)2) can be calculated as follows:
Molar mass of zinc(I) phosphate (Zn3(PO4)2) = 3 x (Molar mass of zinc (Zn)) + (2 x Molar mass of phosphorus (P)) + 8 x (Molar mass of oxygen (O))
After calculating the molar mass, you can multiply the number of moles of zinc(I) phosphate by its molar mass to find out the mass of zinc(I) phosphate produced.
Note: Due to the lack of specific molar mass values for hydrogen gas (H2), we ignore the calculation for determining the mass of hydrogen gas produced.
I wonder why phosphoric acid is not as good as hydrophosphoric acid. Also, note that Zn is Zn(II) phosphate etc.
3Zn + 2H3PO4 ==> Zn3(PO4)2 + 3H2
mols Zn = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols Zn to mols Zn3(PO4)2.
Then g Zn3(PO4)2 = mols x molar mass = ?