Question

Write out the balanced equation for the reaction that occurs when Ca(OH)2 and H3PO4 react together. You do not need to make your subscripts smaller; just write them out at regular numbers. For example: Ca(OH)2.

Answer 1

3 Ca(OH)2 + 2 H3PO4 = Ca3(PO4)2 + 6 H2O

Left side Rigth side

Ca 3 3
O 3*2+2*4=14 2*4 + 6 = 14
H 3*2 + 2*3 = 12 6*2=12
P 2 2

Answer 2

Step-by-step explanation:

A balanced equation is the one which has equal number of both reactants and products.

The reaction between Ca(OH)2 and H3PO4 is as follows.

Ca(OH)2 + H3PO4
`\rightarrow` Ca3(PO4)2 + H2O

Number of reactant atoms are as follows.

• Ca = 1
• O = 6
• H = 5
• P = 1

Number of product atoms are as follows.

• Ca = 3
• O = 9
• H = 2
• P = 2

To balance the equation, multiply Ca(OH)2 by 3 and H3PO4 by 2 on the reactant side. Also, multiply H2O by 6 on the product side.

Therefore, the balanced chemical equation will be as follows.

3Ca(OH)2 + 2H3PO4
`\rightarrow` Ca3(PO4)2 + 6H2O