Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 32

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The freezing point depression constant for water is $- 1.86 ° C m^{- 1}$ . If $5.00 g {Na}_{2} {SO}_{4}$ is dissolved in $45.0 g H_{2} O$ , the freezing point is changed by $- 3.82 ° C$ . Calculate the van't Hoff factor for ${Na}_{2} {SO}_{4}$ .

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Important Questions on Solutions

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 33

The van't Hoff factor

i

for a compound which undergoes dissociation in one solvent and association in other solvent is respectively:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 34

0.1

molal aqueous solution of a weak acid is

30 %

ionized, If

K_{f}

for water is

1.86 ° C / m

, the freezing point of the solution will be :

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 35

P_{A}

and

P_{B}

are the vapour pressure of pure liquid components,

A

and

B

, respectively of an ideal binary solution. If

X_{a}

represents the mole fraction of component

A

the total pressure of the solution will be.

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 36

Of the following

0.10 m

aqueous solutions, which one will exhibit the largest freezing point depression?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 37

Which one of the following electrolytes has the same value of van’t Hoff factor

i

as that of

{Al}_{2} {({SO}_{4})}_{3}

(if all are

100 %

ionised)?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 38

The boiling point of

0.2 mol {kg}^{- 1}

solution of

X

in water is greater than equimolar solution of

Y

in water. Which one of the following statements is true in this case?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 39

Which one is not equal to zero for an ideal solution:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 4>Q 40

The van’t Hoff factor

i

for a dilute aqueous solution of the strong electrolyte barium hydroxide is