Transition and InnerTransition Elements - Result Question 69
####69. Write the balanced chemical equations for the following reactions.
(i) A mixture of potassium dichromate and sodium chloride is heated with concentrated $H _2 SO _4$.
(ii) Potassium permanganate is added to a hot solution of manganous sulphate.
(1990, 2M)
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Solution:
- (i) $K _2 Cr _2 O _7+4 NaCl+6 H _2 SO _4 \longrightarrow 2 CrO _2 Cl _2$
$$ +4 NaHSO _4+3 H _2 O+2 KHSO _4 $$
(ii) $2 KMnO _4+3 MnSO _4+2 H _2 O \longrightarrow 5 MnO _2$
$$ +K _2 SO _4+2 H _2 SO _4 $$
