Chemistry
Grade-10
Easy
Question
What is oxidation number of P in K3PO4?
- + 1
- + 5
- - 2
- 0
Hint:
Phosphate has +5 charge.
The correct answer is: + 5
For counting oxidation state we first check whether the compound is neutral or charged. If the compound is neutral we consider total oxidation state to be zero, if charged we consider that particular charge to be the total.
K3PO4 is neutral, phosphate is -3 charged PO43-
x + 4(-2) = -3
x = +5
Oxidation state of P is +5.
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