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Nucleophilic Substitution Reaction

11. 1g of a s...

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11. 1g of a sample containing NaCl, NaBr and an inert material, with access of AgNO3, produces 0.526 g of precipitate of AgCl and AgBr. By heating this precipitate in a current of Cl, AgBr converted to AgCl and the precipitate then weighed 0.426 g. Then prove that the % of NaCl and NaBr in the sample us 4.25% & 23.2% respectively.

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The $K_{s p}$ of $A g_{2} C r O_{4}, A g C l, A g B r$ and AgI are respectively, $1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}, 5.0 \times 10^{- 13}, 8.3 \times 10^{- 17}$ . Which one of the following salts will precipitate last if $A g N O_{3}$ solution is added to the solution containing equal moles of NaCl, NaBr, Nal and $N a_{2} C r O_{4}$ ?

K_{s p}

A g_{2} C r O_{4}

, AgCl, AgBr and AgI are respectively,

1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}, 5.0 \times 10^{- 13}, 8.3 \times 10^{- 17}

. Which one of the following salts will precipitate last if

A g N O_{3}

solution is added to the solution containing equal moles of NaCl, NaBr, NaI and

N a_{2} C r O_{4}

?

1.0

g of a sample containing

N a C l

K C l

and some inert impurity is dissolved in excess of water and treated with excess of

A g N O_{3}

2.0

g precipitate of

A g C l

separate out also sample is

23 %

by mass in sodium. Determine the mass percentage of

K C l

Q. A precipitate of

A g C l

A g B r

0.4066

g. On heating a current of chlorine, the

A g B r

is converted to

A g C l

and the mixture loses

0.0725

%

of mass in the original mixture is (as the nearest integer) :

N a C l O_{3}

is converted by heat to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g) obtained will be:

[Given : Molar mass of

A g C l = 143.5 g m o l^{- 1}

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