Question

scientific terminology, the solubility of a substance is a measure of how much solute will dissolve

in a given quantity of solvent at a specific temperature. For example, the solubility of sodium

chloride, NaCl, is 36g per 100 g of water at 200C.

Pressure has little effect on the solubility of solids in liquids because solids and liquids are

incompressible. However, if the temperature changes, more solute will either dissolve or else

precipitate out of solution until equilibrium is reestablished at the new temperature.

Nikhil tested solubility of four salts A, B, C and D at different temperatures and collected the

following data.

Salt dissolved

290 K

313 K

323 K

343 K

353 K

A

22

34

40

93

109

B

43

43

46

50

50

C

27

30

34

37

40

D

25

28

42

54

64

18(i) Which salt has the highest and the lowest solubility at 323 K?

18(ii) A student prepared a saturated solution of 'A' at 323 K and them added 25 g water to it. What

mass of 'A' must be added to again make the solution saturated?

18(iii) The solubility of which salt is the least affected by increase in temperature?

18(iv) What mass of 'D' would be required to make saturated solution in 200 g of water at 290 K?

(a) 25 g of 'D'

(b) 50 g of 'D'

(c) 75 g of 'D'

(d) 200 g of 'D'

18(v) Does the solubility of NaCl increases with the increase in temperature. ​

Answer 1

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GENIUS