Determine the oxidation number of the metals in the following compounds:

CrO₃, KH, CuCl₂ and Pb(NO₃)₂.

Question

Determine the oxidation number of the metals in the following compounds:

CrO₃, KH, CuCl₂ and Pb(NO₃)₂.

| General Chemistry 3

Accepted Answer

CrO₃ ⇒ neutral compound and O = -2 ⇒ 0 = x + 3 (-2) ⇒ x = 6

Oxidation state of Cr = +6

KH ⇒ neutral compound and H bonded to a metal = -1 ⇒ 0 = x – 1 ⇒ x = 1

Oxidation state of K = +1

CuCl₂ ⇒ neutral compound and Cl = -1 ⇒ 0 = x – 2 ⇒ x = 2

Oxidation state of Cu = +2

Pb(NO₃)₂ ⇒ neutral compound and NO₃ = -1 (corresponding anion is NO₃^-) ⇒ 0 = x – 2

Oxidation state of Pb = +2

Exercise 2 | Oxidation-Reduction Reactions