Answer to Question #173061 in Chemistry for jezelle

Question

Calcium hydroxide and phosphoric acid react to form calcium phosphate and water. Find the moles of water, if you have 6.50 moles of calcium hydroxide.

Answer 1

Solution:

The balanced chemical equation:

3Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 6H₂O

According to the equation above:

Moles of Ca(OH)₂ / 3 = Moles of H₂O / 6

Moles of Ca(OH)₂ = Moles of H₂O / 2

Moles of H₂O = 2 × Moles of Ca(OH)₂ = 2 × 6.5 mol = 13 mol

Moles of H₂O = 13 mol H₂O

Answer: 13 mol of water (H₂O).