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

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rachelh94 rachelh94

25-09-2017
Chemistry

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

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magistercollege magistercollege · Answer 1 · 2017-09-25T06:07:00+02:00

Make a quick chart with each element represented, and count them up. HINT - leave the polyatomic anions together - in this case, PO4

Left Right
1 Ca 3
2 O 1
5 H 2
1 PO4 2

Begin by balancing like finding common denominators of fractions - apply to both sides:
I started by adding a 2 in front of H3PO4 on the left, them 6 in front of H2O on the right. Last, a 3 in front of Ca (OH)2. Then, re-count using the chart format to make sure you're right.

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