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Saturated,Unsaturated and Supersaturated Solution

1g of a mixtu...

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1g of a mixture NaCl and NaBr are reacted with H2SO4 and whole is converted into Na2SO4.The weight of Na2SO4 is found to be 2g. Find out the % of NaCl and NaBr in the mixture

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Q. When a mixture of

N a B r

N a C l

is repeatedly digested with

H_{2} S O_{4}

, all the halogens are expelled and

{N a}_{2} S O_{4}

is formed quantitatively. With a particular mixture, it was found that the mass of

{N a}_{2} S O_{4}

obtained is precisely the same as the mass of

N a B r

N a C l

mixture taken. The mass ratio of

N a C l

N a B r

in the mixture is (as nearest integer only) :

64 g

of a mixture of

N a C l

K C l

were treated with concentrated sulphuric acid. The total mass of metal sulphates obtained was found to be %

76 g

. What are the mass percents of

N a C l

in the mixture. The reactions are

2 N a C l + H_{2} S O_{4} \to N a_{2} S O_{4} + 2 H C l

2 K C l + H_{2} S O_{4} \to K_{2} S O_{4} + 2 H C l

Q. 64 g of a mixture of NaCl and KCl were treated with concentrated sulphuric acid. The total mass of the metal sulphates obtained was found to be 76 g. What is the mass percent of NaCl in the mixture?

(Molar mass of KCl =74.5

g m o l^{- 1}

g m o l^{- 1}

,
Molar mass of

N a_{2} S O_{4}

g m o l^{- 1}

and Molar mass of

K_{2} S O_{4}

g m o l^{- 1}

N a C l + H_{2} S O_{4} \to N a_{2} S O_{4} + H C l K C l + H_{2} S O_{4} \to K_{2} S O_{4} + H C l

N a C l

N a B r

N a I

mixture on adding

c o n c . H_{2} S O_{4}

gives gases, respectively :

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