Frequently Asked Question

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Determine the oxidation state of p in HPO4²-

Accepted Answer

The oxidation state of P in HPO4²⁻ is +5. Here's how to determine it:
1. Assign oxidation states to known elements:

Hydrogen (H) typically has an oxidation state of +1.

Oxygen (O) typically has an oxidation state of -2.
2. Set up an equation:

Let 'x' represent the oxidation state of phosphorus (P).

The overall charge of the ion is -2.

The equation is: (+1) + x + 4(-2) = -2
3. Solve for x:

1 + x - 8 = -2

x = +5


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