Question

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1." Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O

Answer 1

Step-by-step explanation:

A balanced equation is the one which contains equal number of atoms on both reactant and product side.

For example,
`Ca(OH)_(2) + H_(3)PO_(4) \rightarrow Ca_(3)(PO_(4))_(2) + H_(2)O`

Number of atoms on reactant side are as follows.

• Ca = 1

• O = 6

• H = 5

• P = 1

Number of atoms on product side are as follows.

• Ca = 3

• O = 9

• H = 2

• P = 2

Therefore, to balance the chemical equation multiply
`Ca(OH)_(2)` by 3 and multiply
`H_(3)PO_(4)` by 2 on reactant side. Whereas multiply
`H_(2)O` by 6 on product side.

Hence, the balanced chemical equation will be as follows.

`3Ca(OH)_(2) + 2H_(3)PO_(4) \rightarrow Ca_(3)(PO_(4))_(2) + 6H_(2)O`

Answer 2

The balanced equation for

Ca(OH)2 + H3PO4→ Ca3(PO4)2 + H2O is

3 Ca(OH)2 +2 H3PO4→ Ca3(Po4)2 + 6 H2O

3 moles of Ca(OH)2 reacted with 2 moles of H3PO4 to form 1 mole of Ca3(PO4)2 and 6 moles of H2O