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Saturated,Unsaturated and Supersaturated Solution

0.9031 g of m...

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0.9031 g of mixture of NaCl and kCl on treatement with H2SO4 gave 1.0784 g of a mixture of Na2SO4 & k2SO4. Calculate the % composition of the original mixture

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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

Q. 20 ml of a mixture of

C_{2} H_{2}

and CO was exploded with 30ml of oxygen. The gases after the reaction had a volume of 34ml. On treatement with

K O H

, 8ml of oxygen remained. Calculate the composition of the mixture.

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) :

4 g

of a mixture of

N a C l

N a_{2} C O_{3}

were dissolved in water and volume made up to

250 m L

15 m L

of this solution required

50 m L

N / 10 H C l

for complete neutralisation. Calculate the percentage composition of the original mixture.

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