Q15 of 31 Page 1

Calculate the boiling point of solution when 2g of was dissolved in 50g of water, assuming undergoes complete ionization.

Given: Wsolute (W2) = 2g


Msolute (M2)= 142 g/mol


Wsolvent (W1) = 50g


Kb for water = 0.52 K kg /mol


Dissociation of Na2SO4:


Na2SO4→ 2Na+ + SO42-


i(no. of particles after dissociation) =3


First, we apply the formula:


ΔTb = i×Kb× m



∴


⇒


⇒ ΔTb = 0.439 K


To calculate boiling point of the solution, we apply the formula given below:


Tb = Tb° + ΔTb


⇒ Tb = 100 K + 0.439 K


⇒ Tb = 100.496K


Thus, the boiling point of the solution is 100.496 K


More from this chapter

All 31 →
13

Define the following terms:

A. O/W Emulsion


B. Zeta potential


C. Multimolecular colloids

 14

A. Name the method of refining which is based on the principle of adsorption.

B. What is the role of depressant in froth floatation process?


C. What is the role of limestone in the extraction of iron from its oxides?

 16

Assign reason for the following:

A. is a stronger reducing agent than


B. Sulphur shows more tendency for catenation than Oxygen.


C. Reducing character increases from HF to HI.

 17

Write the major monohalo product(s) in each of the following reactions:

A.


B.


C.