Question

If 25g of lead phosphate reacts with an excess of sodium nitrate, how many dreams of sodium phosphate is produced?

Answer 1

I can tell you this will never do it because the spontaneous reaction is the reverse of what you have. However, here is how you work the theoretical (and it's ony theoretical) problem.

1. Write and balance the equation.
Pb3(PO4)2 +6NaNO3 ==> 2Na3PO4 + 3Pb(NO3)2

2. Convert grams Pb3(PO4)2 to mols. mols = grams/molar mass.

3. Using the coefficients in the balanced equation, convert mols Pb3(PO4)2 to mols Na3PO4.

4. Convert mols Na3PO4 to grams. g = mols x molar mass. This is the theoretical yield