What is the correctly balanced equation for the complete neutralization of H3PO4 by Ca(OH)2 ?

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In a neutralization, you have a substance that is classified as an acid (H3PO4) being combined with a substance that is classified as a base (Ca(OH)2).  Acids are substances that dissociate into hydrogen ions (H+), while bases are substances that dissociate into hydroxide ions (OH-).  The combination of these two during a neutalization produces a salt (Ca3(PO4)2) and water (H2O.

Here is the unbalanced equation:

H3PO4  +  Ca(OH)2 --->  Ca3(PO4)2  +  H2O

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