(a) Define saturated solution. [1 mark]

(b) Both Sarika and Mohan were asked to make salt solution. Sarika was given a teaspoonful of salt and half a glass of water, whereas Mohan was given twenty teaspoons full of salt and half a glass of water. Who would be able to prepare saturated solution? [1 mark]

(c) Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar ? In which case would it be possible to dissolve more sugar? [3 marks]

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Solution

(a) A solution in which no more solute can be dissolved at a given temperature is called a saturated solution. [1 mark]

(b) Since Mohan has an excess amount of salt as compared to Sarika to dissolve in half a glass of water, he would be able to prepare saturated solution [1 mark]

(c) The maximum amount of solute that can be dissolved in a given quantity of a solvent at a given temperature increases with the increase in the temperature. [1 mark]

When ice is added to the lemonade, its temperature decreases. So, less sugar can be dissolved in it now. [1 mark]

Therefore, in order to dissolve more sugar in the lemonade, we should add ice only after dissolving the sugar. [1 mark]

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Lemonade is prepared by mixing lemon juice and sugar in water.You wish to add ice to cool it.Should you add ice to the lemonade before or after dissolving sugar?In which case would it be possible to dissolve more sugar? Does water dissolve an equal amount of salt and sugar? What can be done to dissolve more salt in a saturated solution of water and salt? [5 MARKS]

Q. Both Sarika and Mohan were asked to make salt solution. Sarika was given a teaspoonful of salt and half a glass of water, whereas Mohan was given twenty teaspoons full of salt and half a glass of water.
(a) How would they make salt solutions?
(b) Who would be able to prepare saturated solution?

Q. Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar? [3 marks]

42 Both Sarika and Mohan were asked to make a salt solution. Sarika was given a teaspoonful of salt and half a glass of water whereas, Mohan whereas was given twenty teaspoonfuls of salt and half a glass of water

(b) Who would be able to prepare a saturated solution.

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