Question

3 Ca(OH)2 + 2 H3PO4 → 6 H2O + Ca3(PO4)2

How many moles of H2O would be produced if 5.2 moles of H3PO4 are reacted with excess calcium hydroxide?

2.6 moles H2O
11 moles H2O
15.6 moles H2O
7.8 moles H2O

Answer 1

15.6 moles

Step-by-step explanation:

For every 2 moles of H3PO4 that is reacted, 6 moles of H2O are produced.

So if 5.2 moles of H3PO4 are reacted with calcium hydroxide, calculate the moles of H2O produced by this:

5.2 moles H3PO4 * (6 moles H2O / 2 mole H3PO4) = 15.6 moles H2O

Therefore 15.6 moles of H2O would be produced if 5.2 moles of H3PO4 are reacted with calcium hydroxide.