Based on the information from the above graph, predict which of the two compounds. Class 9

Based on the information from the above graph, predict which of the two compounds. Class 9

Question 1.

Based on the information from the above graph, predict which of the two compounds, ‘A’ or ‘B’, will dissolve more in a given amount of water at a given temperature? Class 9

Answer:

Compound 'B' will dissolve more in a given amount of water at any given temperature. This is because the solubility curve of compound 'B' lies above that of compound A', indicating higher solubility at the same temperature.

Question 2.

Observe Fig. 5.6 and fill in the blanks of the following statements: Class 9

(i) The solubility of compound ‘A’ in water at 20 °C is (less than/more than/similar to) its solubility at 60 °C.

(ii) The solubility of compound ‘B’ at 20 °C is (less than/ more than/similar to) its solubility at 60 °C.

(iii) The solubility of increases more than that of with an increase in the temperature.

Answer:

(i) less than,

(ii) less than,

(iii) compund 'B', compound 'A'.

Question 3.

What do you think will happen if you make a saturated solution at a higher temperature and cool it slowly? Let us find out! Class 9

Answer:

If you make a saturated solution at a higher temperature and cool it slowly, crystals of the solute will formed and separate out. This occurs because solubility decreases with temperature for most solids, making the solution supersaturated upon cooling, the slow cooling allows solute particles to organize into well-defined crystals at the bottom.