The solubility of ammonium chloride in water at various temperatures is given below :

Temperature : 10°C 20°C 40°C 60°C 80°C

Solubility : 24 g 37 g 41 g 55 g 66 g

What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?

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Solution

Given that,
Solubility at 40°C = 41 gm
solubility = Solid dissolved in 100 grams of water in a solution
So, mass of ammonium chloride, required to make a saturated solution of ammonium chloride, in 50 gm of water at 40°C = $\frac{41}{2} g$ = 20.5 gm

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Q. Pragya tested the solubility of three different substances at different temperatures and collected the data as given below( results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).

Substance dissolved	Temperature in K
Substance dissolved	283	293	313	333	353
Potassium nitrate	21	32	62	106	167
Sodium chloride	36	36	36	37	37
Potassium chloride	35	35	40	46	54
Ammonium chloride	24	37	41	55	66

(a) What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K?

(b) Pragya makes a saturated solution of potassium chloride in water at 353 K and leaves the solution to cool at room temperature. What would she observe as the solution cools? Explain.

(c) Find the solubility of each salt at 293 K. What salt has the highest solubility at this temperature?

(d) What is the effect of change of temperature on the solubility of a salt?

Q. Pragya tested the solubility of three different substances at different temperatures and collected the data as given below(results are given in the following table, as grams of substance dissolved in

100

grams of water to form a saturated solution).

(a)

What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in

50

grams of water at

313

(b)

Pragya makes a saturated solution of potassium chloride in water at

353 K

and leaves the solution to cool at room temperature. What would she observe as the solution cools? Explain.

(c)

Find the solubility of each salt at

293 K

. Which salt has the highest solubility at this temperature?

(d)

What is the effect of change of temperature on the solubility of a salt?

Srivani tested the solubility of potassium chloride in water at different temperatures and collected the data as given below.
$\begin{matrix} Temperature (degree celsius) & 20 & 30 & 40 & 50 & 60 Solubility (g per 100 ml) & 34.2 & 37.2 & 40.1 & 42.6 & 45.8 \end{matrix}$

What amount of salt is reqired to make a saturated solution with 200 mL of water at $40^{\circ} C$ ?

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Temperature	:	10°C	20°C	40°C	60°C	80°C
Solubility	:	24 g	37 g	41 g	55 g	66 g

The solubility of ammonium chloride in water at various temperatures is given below : Temperature : 10°C 20°C 40°C 60°C 80°C Solubility : 24 g 37 g 41 g 55 g 66 g What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?

Given that, Solubility at 40°C = 41 gm solubility = Solid dissolved in 100 grams of water in a solution So, mass of ammonium chloride, required to make a saturated solution of ammonium chloride, in 50 gm of water at 40°C = 412g = 20.5 gm

Given that,
Solubility at 40°C = 41 gm
solubility = Solid dissolved in 100 grams of water in a solution
So, mass of ammonium chloride, required to make a saturated solution of ammonium chloride, in 50 gm of water at 40°C = $\frac{41}{2} g$ = 20.5 gm