Question

How many moles of water (H2O) would be produced from the reaction of 3 moles of hydrochloric acid (HCl) reacting with excess calcium hydroxide (Ca(OH)2)?

Answer 1

Answer:

3 moles

Explanation:

The balanced chemical equation between Calcium Hydroxide and Hydrochloric acid is:

Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

The ratio of HCl to H₂O is  2 : 2

So if 3 moles of hydrochloric acid is added, 3 moles of water will be formed:

[x is the no of moles of H₂O produced]

2 : 2

3 : x  

[Cross multiply]

2x = 2 × 3

2x = 6

x = $\frac{6}{2}$ = 3 moles