Question

volume percent
The following table gives the solubility at different
temperatures of different salts.
Temperature in Kelvin
Substance dissolved 283 293 313 333 353
KNO,
21 32 62 106 167
Naci
36 36 36 37 37
KC
35 35 40 46 54
NH,
24 37 41 55 66
Answer the following questions based on the table
given above
(a) What mass of KNO, would be needed to produce
a saturated solution of KNO, in 50 grams of water
at 313 K
(b) If saturated solution of KCI is made at 353 K
and then cooled at room temperature, what would
you observe? Explain.
(c) Find the solubility of each salt at 293 K.
(d) Which salt has the lowest solubility at 283 K?
(e) What is the effect of change of temperature on
the solubility of a salt.
ns.(a) 31 g (b) Crystals of KCI (c) KNO, 32 g, NaCl 36
g. KCI 35 g, NH,Cl 37 g (d) KNO,​

Answer 1

Explanation:

Mass of KNO3 to produce a saturated solution KNO3 in 100g of water at 313 K = 62g

Therefore, Mass of KNO3 in 50gms at 313K = (62.0 x 50)/100 = 31.0g

The amount of potassium chloride that should be dissolved in water to make saturated solution increases with temperature.

Thus when the solution cools some of potassium chloride will precipitate out of the solution.

The solubility of the salts at 293K are:-

Potassium nitrate = 32g

Sodium Chloride = 36g

Potassium Chloride = 35g

Ammonium Chloride = 37g

Ammonium chloride has the highest solubility at 293K.

The solubility of salt increases with temperature.

Answer 2

Answer:

(a) What mass of KNO, would be needed to produce

a saturated solution of KNO, in 50 grams of water

at 313 K