ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.82

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What is van't Hoff factor? What type of values can it have if in solution the solute molecules undergo association?

Important Questions on Solutions

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12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.82

What is van't Hoff factor? What type of values can it have if in solution the solute molecules undergo dissociation?

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12th ICSE

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.83

What is van't Hoff factor? How does it modify the equation for the elevation of boiling point?

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.84

Assuming complete dissociation, calculate the expected freezing point of a solution prepared by dissolving

6.00 g

of Glauber's salt,

{Na}_{2} {SO}_{4} . 10 H_{2} O

in

0.100 kg

of water. (Given:

K_{f}

for water

= 1.86 K kg {mol}^{- 1}

, atomic masses :

Na = 23, S = 32, O = 16, H = 1 amu

)

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.85

The freezing point depression of

0.1

molal solution of acetic acid in benzene is

0.25 K . K_{f}

for benzene is

5.12 K kg {mol}^{- 1}

. What conclusion can you draw about the molecular state of acetic acid in benzene?

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.86

2.0 g

of benzoic acid dissolved in

25.0 g

of benzene shows a depression in freezing point equal to

1.62 K

. Molal depression constant

(K_{1})

of benzene is

4.9 K kg {mol}^{- 1}

. What is the percentage association of the acid?

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.87

Calculate the van't Hoff factor of

{CdSO}_{4}

(molecular mass

= 208.4

) if the dissociation of

5.21 g

of

{CdSO}_{4}

in half litre water gives a depression in freezing point of

0.168 ° C

. (

K_{f}

of water is

1.86 K kg {mol}^{- 1}

)

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.88

A

0.1 M

solution of

NaCl

is found to be isotonic with

1 %

urea solution. Calculate van't Hoff factor,

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12th ICSE

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ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.88

A

0.1 M

solution of

NaCl

is found to be isotonic with

1 %

urea solution. Calculate degree of dissociation of

NaCl

.