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Standard XII

Chemistry

Solublity

A complex is ...

Question

A complex is represented as CoCl3.xNH3 . Freezing point of its 0.1 molal solution is -0.558. Kf=1.86. Assuming 100% dissociation and coordination number of Co(lll) is six then what is the complex?

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Q. A complex is represented as

C o C l_{3} . x N H_{3}

its 0.1 molal solution in aq. solution shows

Δ T_{f} = {0.558}^{0} C . K_{f}

for

H_{2} O

1.86

K m o l^{- 1} k g

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Q. A complex is represented as

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. Its 0.1 molal solution in water shows

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Q. If the freezing point of a 0.01 molal aqueous solution of a cobalt(III) chloride-ammonia complex (which behaves as a strong electrolyte) is

- {0.0558}^{\circ} C,

the number of chloride(s) in the coordination sphere of the complex is:

[K_{f}

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CoC l_{3} x N H_{3}

. Its 0.05 molal solution in water shows

Δ T_{f} = 0.279 K

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is 1.86

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If the freezing point of a 0.01 molal aqueous solution of a cobalt chloride ammonia complex ( which behaves as a strong electrolyte ) is 0.0558 degree Celsius, the number of chloride in the coordination sphere of the complex is ? (kf of water = 1.86k kg/mole

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