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Nucleophilic Addition at the Carbonyl

10 g of Mno2 ...

Question

10 g of Mno2 on reaction with HCI forms 2.24 L of Cl2(g) at NTP, the percentage impurity of MnO2 is (1) (3) 87% (2) 25% (4) 13% 33.3%

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10 g

M n O_{2}

2.24 L

{C I_{2}}_{(g)}

M n O_{2}

M n O_{2} + 4 H C I \to M n C I_{2} + C I_{2} + 2 H_{2} O

10

M n O_{2}

H C l

0.1

C l_{2}

M n = 55

M n O_{2}

M n O_{2}

y \times 10^{- 1}

0.1344

M n O_{2} (s) + 4 H^{+} + 2 I^{-} \to M n^{2 +} + I_{2} + 2 H_{2} O

32.30

0.07220 M

N a_{2} S_{2} O_{3}

y

(M n O_{2} = 87 g m o l^{- 1})

M n O_{2}

M n O_{2} (s) + 4 H C I (a q .) \to C l_{2} (g) + M n C l_{2} (a q .) + 2 H_{2} O (l)

C l_{2}

M n O_{2 (s)} + 4 H C l_{(a q)} H e a t - -- \to M n C l_{2 (a q .)} + 2 H_{2} O + C l_{2 (g)}

M n O_{2}

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