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In coordination chemistry there are a va...

In coordination chemistry there are a variety of methods applied to find out the structure of complexes.One method involves treating the complex with known reagents and from the nature of reaction, the formula of the complex can be predicted.An isomer of the complex `Co(en)_2(H_2O)Cl_2Br`,on reaction with concentrated `H_2SO_4` (dehydrating agent) it suffers loss in weight and on reaction with `AgNO_3` solution it gives a white precipitate which is soluble in `NH_3`(aq).
If one mole of original complex is treated with excess `Pb(NO_3)_2` solution, then the number of moles of white precipitate (of `PbCl_2`) formed will be :

A

0.5

B

`1.0`

C

`0.0`

D

`3.0`

Text Solution

Verified by Experts

(A), Only one `Cl^(-)` ion is of free ion from complex so 1 mole of complex will generate precipate of half mole of `Pb^(2)+2Cl^(-) rarr PbCl_(2)darr` (white)
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In coordination chemistry there are a veriety of methods applied to find out the structure of complexes. One method involves treating the complex with known reagents and from the nature of reaction, the formula0 of the complex can be predicted. An isomers of the complex Co(en)_(2)(H_(2)O)Cl_(2)Br , on reaction with concentrated H_(2)SO_(4) (dehydrating agent ) it suffers loss in weight and on reaction with AgNO_(3) solution it gives a white precipitate which is soluble in NH_(3)(aq) . The correct formula of the complex is :

In coordination chemistry there are a variety of methods applied to find out the structure of complexes. One method involves treating the complex with known reagents and from the nature of raction, the formula of the complex can be predicted. An isomer of the complex Co(en)_(2)(H_(2)O)Cl_(2)Br , on reaction with concentrated H_(2)SO_(4) (dehydrating agent), suffers loss in weight and on reaction with AgNO_(3) solution it gives a white precipitate which is soluble in NH_(3)(aq) . The number of geometrical isomers of the formula fo the above original complex are (including the complex) :