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Q35 : A summing that Vaq = 50 mL and a partition coefficient of KD =...

Q35 :

A summing that Vaq = 50 mL and a partition coefficient of KD = 4, calculate the fraction of the solute that remains in the aqueous phase after four extractions using 25 mL of organic solvent for each extraction.

A.

0.12

B.

0.033

C.

0.012

D.

0.33

Q36 :

What is the major problem in settlers?

A.

The two phases may not be visible

B.

The size of dispersed particles can be large

C.

Colour of the two phases may be same

D.

Emulsification in the mixing wheel

Q37 :

In fractional distillation, a mixture of liquids is separated based on their:

A.

Density

B.

Chemical composition

C.

Boiling point

D.

Solubility

Q38 :

What happens at equilibrium during sublimation?

A.

Vapor pressure of solid is equal to partial pressure of solute in liquid

B.

Vapor pressure of solid is equal to partial pressure of solute in gas

C.

Vapor pressure of liquid is equal to solid

D.

Vapor pressure of solid is equal to vapor pressure of gas

Q39 :

Which type of liquid-liquid extraction is efficient:

A.

Multistage cross current

B.

Single stage

C.

Multistage counter current

D.

Multistage co current

Q40 :

Example of filter for continuous mode of filtration

A.

Tubular

B.

Rotary vacuum

C.

Plate and frame

D.

Spiral wound

Solutions

Expert Solution

Q 35:

option C is the correct answer.

information given:

solute is present in water only.

we will assume that the water and organic solvent are immiscible and only the solute is transferred between the two phases. therefore, the raffinate and aqueous feed streams will be equal.

and, the solvent and extract feed streams will be equal.

partition coefficient, KD is defined as the ratio of the concentration of solute in organic solvent to the concentration of solute in aqueous solution after extraction.

..............(1)

Amanda K answered 6 months ago
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