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Chemical Properties

5g of MnO2 on...

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5g of MnO2 on reaction with HCl forms 1.12L of Cl2 gas at STP. The impurity of MnO2 is

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Q. Calculate the weight of

M n O_{2}

H C l

of specific gravity

1.2

5 %

by weight needed to produce

1.12 L

C l_{2}

at STP by the reaction (as nearest integer).

M n O_{2} + 4 H C l \to M n C l_{2} + 3 H_{2} O + C l_{2}

x

M n O_{2}

and the volume of

H C l

of specific gravity

1.2 g

m L^{- 3}

5 %

by weight needed to produce

1.12 L

C l_{2}

at STP by the reaction,

M n O_{2} + 4 H C l \to M n C l_{2} + 3 H_{2} O + C l_{2}

then value of 100X is :

M n O_{2} + 4 H C l ⟶ M n C l_{2} + 2 H_{2} O + C l_{2}

2

M n O_{2}

4

H C l

11.2

C l_{2}

at STP. Thus, percent yield of

C l_{2}

10 g

M n O_{2}

on reaction with HCI forms

2.24 L

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

at NTP, the percentage impurity of

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

M n O_{2} + 4 H C l \to 2 H_{2} O + M n {C l}_{2} + {C l}_{2}

The reaction of

M n O_{2}

H C l

2.24 L

{C l}_{2}

gas. What mass of

M n O_{2}

was used up by the reaction? (At. mass of

M n = 55 g / m o l

)

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