Question
Explain valence bond theory for coordination compounds.
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(Kf for CS2 = 3.83 K kg mol–1, Atomic mass of Sulphur = 32 g mol–1]
i. $\text{MnO}_{4(aq)}^{-}+\text{S}_{2}\text{O}_{3(aq)}^{2-}+\text{H}_{2}\text{O}_{(l)}\rightarrow$
ii. $\text{Cr}_{2}\text{O}^{-}_{7(aq)}+\text{H}_{2}\text{S}_{(g)}+\text{H}^{+}_{(aq)}\rightarrow$
positive (+ 1·57 V) as compared to Cr3+/Cr2+.