Question

Write an equation for the reaction of phosphoric acid (H3PO4) and calcium hydroxide. What is the coefficient of calcium hydroxide in this equation?

Answer 1

The answer to your question is " 3 "

Step-by-step explanation:

Equation = ?

Phosphoric acid = H₃PO₄

Calcium hydroxide = Ca(OH)₂

This is an acid base reaction because there is an exchange of hydrogens.

Reaction

H₃PO₄ + Ca(OH)₂ ⇒ Ca₃(PO₄)₂ + H₂O

Balance

Reactants Elements Products

1 P 2

1 Ca 3

5 H 2

6 O 9

The reaction is unbalanced

2H₃PO₄ + 3Ca(OH)₂ ⇒ Ca₃(PO₄)₂ + 6H₂O

Balance

Reactants Elements Products

2 P 2

3 Ca 3

12 H 6

14 O 14

Now, the reaction is balanced, the coefficient of Calcium hydroxide is 3