Question

Give the oxidation state of underlined.
$H_2\underset{–}{S}{O}_5$.

Answer 1

Hydrogen has +1 oxidation number.Two oxygen atoms are linked through peroxide linkage so they have -1 oxidation number and other 3 oxygen atoms have -2 oxidation number. Let sulphur has $x$ oxidation number so,

$x+2(-1)+3(-2)+2(+1)=0$

$x=+6$