Solubility

Q. What is brine?

Q.

What is saturated solution and how can we make an saturated solution?

Q.

Calculate mass/volume percentage of 20% solution by mass of sulphuric acid

Q. Consider the following statements:
Statement-1: The solubility of gases in liquids decreases on increasing the temperature.
Statement-2: The solubility of gases in liquids increases on increasing the pressure.
Now, choose the correct option.

1. Only statement-1 is correct
2. Only statement-2 is correct
3. Both the statements are correct
4. Both the statements are incorrect

Q.

Explain with activity that particles of matter are made up of particles

Q.

Describe in your own words, what happens to the particles when salt dissolve in water.

Q.

What is supersaturated solution?

Q.

What is mother liquor?

1. Excess solute in the solution.

2. The saturated solution left behind after the separation of crystals.

3. The hot saturated solution of the substance.

4. Cooled down supersaturated solution.

Q.

define saturated dilute and concentrated solutions

Q.

Which of the following represents the solubility of sugar in water at ${20}^{\circ }C?$

(a) 21 g (b) 204 g (c) 37 g (d) 164 g

Q.

Name two liquids that are soluble in water.

Q. Question 3 (c)
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).

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

Q.

What will happen when a small crystal of solute is added to supersaturated solution?

Q.

What is seeding?

1. Adding a crystal of pure subsatnce into its saturated solution.

2. Adding a crystal of impure substance into its saturated solution.

3. Adding a crystal of impure substance into its unsaturated solution.

4. Adding a crystal of pure substance into its unsaturated solution.

Q.

Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of a flower, soil, copper sulfate crystals, glucose, and wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water

Q.

Solubility of NaCl at ${40}^{\circ }C$ is 36.5 g. What is meant by this statement?

Q.

Defination of single phase

Q. What is a saturated solution? How can an unsaturated solution be changed to a saturated solution without adding any more solute to it?

Q. Solubility of a solid in water always increases with increase in temperature. State true or false.

1. False
2. True

Q.

A solution in which no more solute can be dissolved at a given temperature is known as:

1. True solution

2. Saturated solution

3. Unsaturated solution

4. Dilute solution

Q. The specific conductance of a saturated solution of AgBr is k. The limiting ionic conductivity of Ag and Br ions are X and Y resp. The solubility of AgBr is

Q.

Differentiate between saturated, unsaturated, and supersaturated solutions.

Q. A dilute solution has amount of solute dissolved in it as compared to a concentrated solution having the same amount of solvent.

1. more
2. less
3. equal

Q.

100 mL of water at room temperature of ${25}^{\circ }C$ is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring while keeping the temperature of solution constant at ${30}^{\circ }C.$ After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker. The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.

(a) What name is given to solutions like X?

(b) What name is given to solutions like Y?

(c) What will you observe if the solution Y at ${30}^{\circ }C$ is cooled down to ${10}^{\circ }C$ by keeping the beaker in crushed ice? Why?

(d) What term is used to denote the amount of solid dissolved in 100 grams of water in a solution like Y?

Q.

(a) Define solubility of a substance. How does it vary with temperature ?

(b) What do you understand by the statement "the solubility of copper sulphate in water at ${20}^{\circ }Cis20.7g"?$

(c) What is the effect of temperature on the solubility of solids in liquids ?

Q. Question 4 (a)
Explain the following giving examples.
a. Saturated solution

Q. If 34.2 g of sucrose is dissolved in 250 g water then the freezing point of the solution will be

[Molar mass of sucrose = 342 g mol^–1; K_f of water = 1.86 K kg mol^–1]

यदि 34.2 g सूक्रोज को 250 ह जल में घोला जाता है, तो विलयन का हिमांक होगा

[सूक्रोज का मोलर द्रव्यमान = 342 g mol^–1; जल का K_f = 1.86 K kg mol^–1]

1. –1.25 °C
2. –0.74 °C
3. –0.25 °C
4. –1.51 °C

Q. When a gas is filled in a closed vessel is heated through 1 Degree Celsius its pressure is increased by 0.4% age the initial temperature of the gas was?

Q.

(a) Find the solubility of $KN{O}_{3}at{20}^{\circ }C$ when the mass of the empty dish is 50 g, the mass of dish and solution is 65 g, while the mass of dish and residue is 54.3 g.

(b) What weight of sodium nitrate will separate when a saturated solution containing 50 gram of water is cooled from ${50}^{\circ }Cto{30}^{\circ }C$? The solubility of $NaN{O}_{3}at{50}^{\circ }and{30}^{\circ }$ is 114 g and 86 g respectively.

Q.

Why does a salt disappear when dissolved in water?