Question

why is the oxidation state of cl is +7 in clo4- when cl has a oxidation state of-1​

Answer 1

Answer:

The 7+ oxidation state of Cl is present in perchlorate ion ClO4^-

It doesn’t mean a 7+ Cl ion in the middle. Cl is surrounded by four O atoms. Each O atom is bounded by a double bonding. Because oxygen is more electronegative than chlorine all electrons in this double bondings are counted with oxygen, so each oxygen has a formal charge of 2-. The ion has a charge of 1-. Thus rests for Cl a formal charge of 7+ , because (7+) + 4*(2-) = 1-.

Answer 2

Explanation: oxidation state of cl is +7 in ClO4- because

we know that oxygen have -2 charge and chlorine has -1. Formula :-

(the number of first atoms)(the oxidation number the first atom) + (the number of 2nd atoms)(oxidation number of the second atom) = total charge of the compound.

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

X= +7