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

The answer to your question is " 3 "

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