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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 ?
We should add ice after dissolving sugar because when the temperature is high, more sugar can be dissolved. After mixing ice, it gets cold and less sugar will dissolve in it.
Explanation:
As we know, the solubility of solids decreases with a decrease in temperature. Hence, it is difficult to dissolve sugar in cold water. By this, we can say that sugar is insoluble in ice as the solubility of solids decreases with a decrease in their temperature. As ice floats on water and sugar settles down in the water, the sugar, being heavier, remains insoluble.
Therefore, in order to prepare a cool lemonade, sugar should be dissolved first, followed by the addition of ice.
[Extra information:
Ice floats on water because water is about 9% heavier than ice. As the water is heavier, it displaces the lighter ice, causing the ice to float to the top. This is one of the reasons why life on Earth exists.
During winter, when surface temperatures are low enough for water to freeze, floating ice forms an insulating layer on top of lakes and seas. This layer of ice insulates the water below by allowing it to stay liquid, which allows the marine life within it to exist.]
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