Solutions Question 333

Question: The elevation in boiling point of a solution of 13.44 g of CuCl2 in 1 kg of water using the following information will be (Molecular weight of CuCl2=134.4g and Kb=0.52,Kkg,mol1 )

Options:

A) 0.16

B) 0.05

C) 0.1

D) 0.2

Show Answer

Answer:

Correct Answer: A

Solution:

(i) i=No.ofparticlesafterionisationNo.ofparticlesbeforeionisation (ii) ΔTb=i×Kb×m

i=1+2α1,=1+2α Assuming 100% ionization So, i=1+2=3

ΔTb=3×0.52×0.1=0.1560.16

(m=13.44134.4=0.1)



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