Single Choice

The weight of an empty china dish is 39 g and when a saturated solution of potassium nitrate is poured into, its weight is 108 g at $$50^{\circ}C$$. After evaporating the solution to dryness, if the weight of the dish along with the crystals is 72 g then the solubility of potassium nitrate at $$50^{\circ} C$$ is .....................

A$$83.9$$
B$$95.6$$
C$$91.6$$
Correct Answer
D$$87.4$$

Solution

The formula for calculating the solubility can be written as:
$$\dfrac{Mass \ of \ salt(g)}{Mass \ of \ water(g)} = \dfrac{Solubility \ of \ salt}{100 \ g \ water}$$
Mass of saturated solution of $$KNO_{3}$$ = 108 - 39 = 69g
Mass of water = $$108 - 72g = 36g$$

Mass of $$KNO_{3}$$ =$$ 69 - 36 = 33g$$

$$\therefore$$ Solubility of $$KNO_{3}$$ = $$\dfrac{33\times 100}{36}$$ = 91.6

SIMILAR QUESTIONS

Solutions

If Raoult's law is obeyed, then vapour pressure of the solvent in a solution is directly proportional to:

Solutions

For a dilute solution, Raoult's law states that:

Solutions

Which one of the following is incorrect for ideal solution?

Solutions

The mixture which shows positive deviation from Raoult’s law is

Solutions

For a dilute solution, Raoult's law states that:

Solutions

Which of the following is satisfied by an ideal solution?

Solutions

What are the similarities between Raoult's Law and Henry's Law

Solutions

State the following : Raoult's law in its general form in reference to solutions .

Solutions

State Raoult's law for the solution containing volatile components. Write two differences between an ideal solution and a non-ideal solution.

Solutions

The relative lowering of the vapour pressure is equal to the ratio between the number:

Contact Details