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Standard XII

Chemistry

Arrhenius Acid

What mass of ...

Question

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

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Solution

Solution of potassium nitrate in 50 g at 313 K
100 g of water contains potassium nitrate = 62 g
50 g will contain 31 g
$∴$ 31 g of potassium nitrate is required.

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A student, while testing the solubility of potassium nitrate at 313k, found that the solubility is 62 in 100g of water. What masses of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50g of water at 1313k?

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 K?

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?

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. Which of these actions will cause more potassium nitrate to dissolve in a saturated potassium nitrate solution?
I. Grind the potassium nitrate and then add to the solution while stirring
II. Add more potassium nitrate while using a magnetic stirrer
III. Add more potassium nitrate and heat the solution

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

Solution of potassium nitrate in 50 g at 313 K100 g of water contains potassium nitrate = 62 g50 g will contain 31 g∴ 31 g of potassium nitrate is required.

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

Solution of potassium nitrate in 50 g at 313 K
100 g of water contains potassium nitrate = 62 g
50 g will contain 31 g
$∴$ 31 g of potassium nitrate is required.