不需要智商的方程式题

PROBLEM 2
Write down equations for the following reactions:
2.1 Oxidation of chromium(III) chloride with bromine in alkaline solution (KOH).
2.2 Oxidation of potassium nitrite with potassium permanganate in acid solution (H 2 SO 4 ).
2.3 Action of chlorine on lime water (Ca(OH) 2 ) in a cold reaction mixture.

 

 

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SOLUTION
2.1 2 CrCl 3 + 3 Br 2 + 16 KOH → 2 K 2 CrO 4 + 6 KBr + 6 KCl + 8 H 2 O
2.2 5 KNO 2 + 2 KMnO 4 + 3 H 2 SO 4 → 2 MnSO 4 + K 2 SO 4 + 5 KNO 3 + 3 H 2 O
2.3. Cl 2 + Ca(OH) 2 → CaOCl 2 + H 2 O