Question #d9b58

1 Answer
Candy
Jan 28, 2018

See below:

Explanation:

#H_3PO_4(aq)+Ca(OH)_2(aq) rarr Ca_3(PO_4)_2+H_2O(l)#

Balance the non-hydrogen atoms to get:

#2H_3PO_4(aq)+3Ca(OH)_2(aq) rarr Ca_3(PO_4)_2+H_2O(l)#

To balance the oxygen atoms, we need to add 5 water molecules to the right hand side of the equation:

#2H_3PO_4(aq)+3Ca(OH)_2(aq) rarr Ca_3(PO_4)_2+H_2O(l)+5H_2O#
You'll see now that the hydrogen atoms have automatically balanced our. So, you don't need to add any hydrogen ions here.

Thus, our final equation is:

#2H_3PO_4(aq)+3Ca(OH)_2(aq) rarr Ca_3(PO_4)_2+6H_2O#

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