# How to Balance Chemical Equation for Oxygen

What is the equation for balancing the oxygen in the chemical equation Ca3(PO4)2 + H3PO4 → Ca(H2PO4)2?

To balance the chemical equation for oxygen in Ca3(PO4)2 + H3PO4 → Ca(H2PO4)2, the equation is 8X1 + 8x2 = 2X3.

## Understanding Oxygen in the Chemical Equation

**To balance the given chemical equation, let's first analyze the equation for oxygen (O):**

On the left side of the equation, we have X1 Ca3(PO4)2 and x2 H3PO4, which contain oxygen. The calcium phosphate compound, Ca3(PO4)2, contains a total of 8 oxygen atoms (4 oxygen atoms from each phosphate group). The phosphoric acid, H3PO4, contains 4 oxygen atoms. So, on the left side, the total number of oxygen atoms is 8X1 (from Ca3(PO4)2) + 4x2 (from H3PO4) = 8X1 + 8x2.

On the right side of the equation, we have X3 Ca(H2PO4)2, which also contains oxygen. The calcium dihydrogen phosphate compound, Ca(H2PO4)2, contains a total of 2 oxygen atoms. So, on the right side, the total number of oxygen atoms is 2X3.

**To balance the equation for oxygen, the total number of oxygen atoms on the left side should be equal to the total number of oxygen atoms on the right side.**

Therefore, we can set up the equation: 8X1 + 8x2 = 2X3.