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Werner's Coordination Theory

0.02 mole of ...

Question

0.02 mole of $[C o (N H_{3})_{5} B r] C l_{2}$ and 0.02 mole of $[C o (N H_{3})_{5} C l] S O_{4}$ are present in 200 cc of a solution X. The number of moles of the preceipitates Y and Z that are formed when the solution X is treated with excess silver nitrate and excess barium chloride are respectively :

A

0.02,0.02

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B

0.01,0.02

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C

0.02,0.04

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D

0.04,0.02

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Solution

The correct option is D 0.04,0.02
0.02 mole of $[C o (N H_{3})_{5} B r] C l_{2}$ will dissociate to give $2 \times 0.02 = 0.04$ moles of chloride ions. On reaction with silver nitrate, 0.04 moles of silver chloride precipitate will be obtained.
$[C o (N H_{3})_{5} B r] C l_{2} \to [C o (N H_{3})_{5} B r]^{2 +} + 2 C l^{-}$
0.02 mole of $[C o (N H_{3})_{5} C l] S O_{4}$ will dissociate to give $0.02$ moles of sulphate ions. On reaction with barium sulphate, 0.02 moles of barium sulphate precipitate will be obtained.
$[C o (N H_{3})_{5} C l] S O_{4} \to [C o (N H_{3})_{5} C l]^{2 +} + S O_{4}^{2 -}$

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Similar questions

Q. Mixture X of 0.02 mole of

[C o (N H_{3})_{4} S O_{4}] B r

and 0.02 mole of

[C o (N H_{3})_{5} B r] S O_{4}

was prepared in 2 litre of solution:

1 litre of mixture X + excess of

A g N O_{3} \to Y

1 litre of mixture X + excess of

B a C l_{2} \to Z

Number of moles of Y and Z respectively are :

X = 0.02

[C o (N H_{3})_{5} S O_{4}] B r

and 0.02 mol of

[C o (N H_{3})_{5} B r] S O_{4}

was prepared in 2L of solution.

1L of mixture X + excess

A g N O_{3} \to Y

1L of mixture X + excess

B a C l_{2} \to Z

Number of moles of Y and Z are :

[X] = 0.02

[C o (N H_{3})_{5} S O_{4}] B r

and 0.02 mol of

[C o (N H_{3})_{5} B r] S O_{4}

was prepared in 2 litre of solution.
1 litre of mixture [X] + excess

A g N O_{3} ⟶

[Y]
1 litre of mixture [X] + excess

B a C l_{2} ⟶

[Z]
No. of moles of [Y] and [Z] are :

X

0.02

[C o (N H 3)_{5} S O_{4}] B r

[C o (N H 3)_{5} B r] S O_{4}

was prepared in 2 litre of solution.
1 litre of mixture

X +

A g N O 3 \to

Y.
1 litre of mixture

X +

B a C 1_{2} \to Z

Number of moles of

Y

Z

X

0.02

[C o (N H_{3})_{5} S O_{4}] B r

0.02

[C o (N H_{3})_{5} B r] S O_{4}

was prepared in

2

1

X

A g N O_{3}

\to Y

1

X

B a C l_{2}

\to Z

Number of moles of

Y

Z

is, respectively :

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