Question

What is the Oxidation number for C in C2H2O4

Answer 1

Answer:

-2

Explanation:

Elements in group 17 always have -1 on their ions so their oxidation number is-1. Because there are two carbon atom, the overall oxidation number will be -2.

Answer 2

The oxidation number of each C in $C_{2}H_{2}O_{4}$ is +3.

Explanation:

Oxidation number is defined as the number holded by an atom by either gain or loss of electrons when it chemically combines with another atom.

As we known that oxidation number of hydrogen atom is +1 and oxygen atom is -2. Therefore, let us assume the oxidation number of given carbon atom is x.

Hence, calculate the value of x as follows.

            2(x) + 2(1) + 4(-2) = 0         (as the charge on overall molecule is 0)

            2x + 2 - 8 = 0

                 2x = 6

                   x = +3

Therefore, the oxidation number of each C in $C_{2}H_{2}O_{4}$ is +3.

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