In the balanced chemical equation, how many moles of sodium fluoride are needed to produce 67.4 moles of calcium fluoride? CaSO4 + 2 NaF --> Na2SO4 + CaF2

Question

I have idea of how to work this out.

Answer 1

CaSO4 + 2 NaF --> Na2SO4 + CaF2

Create a conversion factor using the coefficients of the balanced equation. As we are looking for

moles if NaF to get CaF2, the conversion factor is 2 NaF / 1 CaF2. Always put the item you are trying to calculate in the numerator.

Now multiply the mole ratio by the number of moles of CaF2

2 NaF / 1 CaF2 x 67.4 moles CaF2 = 134.8 moles.

The equation tells you that you need 2 moles of NaF for every mole of CaF2 produced.