Grade 12Physical Chemistry
What is the oxidation sates of Cr in given compound
1 Answer
Arun
(i) [Cr(H2O)6]Cl3 : Hexaaquachromium(III) chloride
x + 6 × 0 + (–1) × 3 = 0
x = +3
(ii) [Cr(C6H6)2] : bis(η6–benzene)chromium(0)
y + 2 × 0 = 0
y = 0
(iii) K2[Cr(CN)2 (O)2 (O2) (NH3)] :
Potassium amminedicyanidodioxidoperoxidochromate(VI)
2 × 1 + z + 2 × (–1) + 2 × (–2) + (–2) + 0 = 0
z = +6
The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2], and K2[Cr(CN)2 (O)2 (O2) (NH3)] respectively are +3, 0 and +6.
x + 6 × 0 + (–1) × 3 = 0
x = +3
(ii) [Cr(C6H6)2] : bis(η6–benzene)chromium(0)
y + 2 × 0 = 0
y = 0
(iii) K2[Cr(CN)2 (O)2 (O2) (NH3)] :
Potassium amminedicyanidodioxidoperoxidochromate(VI)
2 × 1 + z + 2 × (–1) + 2 × (–2) + (–2) + 0 = 0
z = +6
The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2], and K2[Cr(CN)2 (O)2 (O2) (NH3)] respectively are +3, 0 and +6.
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