A study of the variation of solubility with temperature yielded the following experimental results: Table: Variation of solubility with temperature in grams per 100 grams of water Salt 10 ° C 20 ° C 30 ° C 40 ° C 50 ° C 60 ° C KBr 59 . 5 62 . 2 70 . 6 35 . 5 80 . 2 95 . 0 K 2 SO 4 9 . 2 11 . 1 13 . 0 14 . 8 16 . 5 21 . 4 NaCl 35 . 8 36 . 0 36 . 3 36 . 6 37 . 0 38 . 4 NaNO 3 80 . 0 88 . 0 96 . 0 104 . 0 114 . 0 148 . 0 Ce 2 ( SO 4 ) 11 . 0 9 . 0 4 . 0 3 . 5 2 . 0 1 . 9 From the data given above answer the following question: Which salt showed the greatest increase in solubility as the temperature rise from 10 ° C to 60 ° C ?

Solubility often depends on temperature and this solubility increases with increasing temperature. Many salts show a large increase in solubility with temperature, but it is not uniform. The solubility of sodium nitrate in water increases with an increase in temperature. Therefore, it showed an increase in solubility as the temperature rise from 10 ° C to 60 ° C .

E M B I B E

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 22

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IMPORTANT

Earn 100

What is the effect of temperature on the solubility of the following salts in water?
Potassium nitrate

Important Questions on Water

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9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 22

What is the effect of temperature on the solubility of calcium sulphate in water?

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 23

What is water of crystallisation?

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S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 23

Name a crystalline salt which does not have the water of crystallisation.

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S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 23

What would you observe when the water of crystallisation of salt is removed by heating? (State two observations).

HARD

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 24

Why does table salt become moist and sticky during the rainy season?

HARD

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 24

Explain the formation of a white powder on the surface of washing soda crystals which are left exposed to the air for some time.

HARD

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 25

Complete the following table:

Common name

Chemical name

Formula

Acid, base or salt

Efflorescent, hygroscopic or deliquescent substance.

Blue vitriol

Quick lime

Oil of vitriol

Washing soda

Solid caustic soda

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 26

A study of the variation of solubility with temperature yielded the following experimental results:
Table: Variation of solubility with temperature in grams per $100$ grams of water

Salt	$10$ $°$ C	$20$ $°$ C	$30$ $°$ C	$40$ $°$ C	$50$ $°$ C	$60$ $°$ C
$KBr$	$59.5$	$62.2$	$70.6$	$35.5$	$80.2$	$95.0$
$K_{2} {SO}_{4}$	$9.2$	$11.1$	$13.0$	$14.8$	$16.5$	$21.4$
$NaCl$	$35.8$	$36.0$	$36.3$	$36.6$	$37.0$	$38.4$
${NaNO}_{3}$	$80.0$	$88.0$	$96.0$	$104.0$	$114.0$	$148.0$
${Ce}_{2} ({SO}_{4})$	$11.0$	$9.0$	$4.0$	$3.5$	$2.0$	$1.9$