There were guests at Sonam’s house. Sonam thought of making lemonade for them. She
dissolved sugar in chilled water and observe that sugar was taking long time to dissolve.
Meanwhile, Sonam’s mother came and asked her to transfer the upper chilled water in another
container and then add water at normal temperature to this sugar settled at bottom.
Sonam then found it easy to dissolve the sugar for lemonade.
(a) What is saturated solution?
(b) What is the effect of temperature on the capacity of water in dissolving substances?
(c) What will happen if we cool a supersaturated solution?
(d) What value of Sonam is shown here?
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Answers
Answer:
a) A solution which can not dissolve further amount of solute at a particular temperature is called saturated solution. For example, when you keep adding sugar to the water, a time will reach when no more sugar will dissolve in the water and sugar will settle down at the bottom.
b)The solubility of a given solute in a given solvent typically depends on temperature. Many salts show a large increase in solubility with temperature. Some solutes exhibit solubility that is fairly independent of temperature. A few, such as cerium(III) sulfate, become less soluble in water as temperature increases.
c)The solid crystals will dissolve into the water in the hydrated crystals forming a supersaturated solution. If the sodium thiosulfate solution is cooled slowly the supersaturated solution will remain liquid. Placing a small crystal in the supersaturated solution will cause the liquid to turn solid.