A complex is represented as `CoCl_(3) . XNH_(3)`. Its `0.1` molal solution in aqueous solution shows `Delta T_(f) = 0.558^(circ). (K_(f)` for `H_(2)O` is `1.86 K "molality"^(-1))` Assuming `100%` ionisation of complex and co-ordination number of `Co` as six, calculate formula of complex.
A
`[Co(NH_(3)_(4)CL_(2)]Cl`
B
`[Co(NH_(3))_(5)Cl]Cl_(2)`
C
`[Co(NH_(3))_(4)CL_(2)]Cl`
D
none of these
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The correct Answer is:
b
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DILUTE SOLUTION
NARENDRA AWASTHI|Exercise Level 1 (Q.62 To Q.91)|1 Videos
A complex is represented as CoCl_(3)Xnh_(3) . Its 0.1 molal solution in water DeltaT_(f)=0.588 K. K_(f) for H_(2)O is 1.86K" molality"^(-1) . Assuming 100% ionisation of complex and co - ordination number of Co is six calculate formula of complex.
A 0.001 molal solution of a complex represented as Pt(NH_(3))_(4)Cl_(4) in water had freezing point depression of 0.0054^(@)C . Given K_(f) for H_(2)O=1.86 K m^(-1) . Assuming 100% ionization of the complex, write the ionization nature and formula or complex.
0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If K_(f) for water is 1.86K kg mol^(-1) , the lowering in freezing point of the solution is
The freezing point of a 0.05 molal solution of a non-electrolyte in water is: ( K_(f) = 1.86 "molality"^(-1) )
For [CrCl_(3).xNH_(3)] , elevation in b.pt of one molal solution is triple of one molal aqueous solution of urea. Assuming 100% ionisation of complex molecule, calculated the value of x .
An aqueous solution of urea has freezing point of -0.52^(@)C . If molarity and molality are same and K'_(f) for H_(2)O = 1.86 K "molality"^(-1) the osmotic pressure of solution would be:
NARENDRA AWASTHI-DILUTE SOLUTION-Level 3 - Match The Column
