Question

Assign oxidation number to the underlined elements in each of the following species
a) K2 MnO4 b) H2 S2O7

please help me fast​ fast

Answer 1

Answer:

a) 6 (b)6

Explanation:

a) 2(+1) + X +4(-2)=0

X= 6

b) 2(+1) + 2X + 7(-2) = 0

X= 6

Answer 2

Explanation:

Let X be the oxidation number of P in NaH

2

PO

4. The oxidation numbers of Na, H and O are +1, +1 and −2 respectively.

+1+2(+1)+X+4(−2)=0

3+X+−8=0

X+−5=0

X=+5

The oxidation number of P in NaH2 PO4is +5.

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