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Aman finds that 200 g of sugar dissolves in 100 g of water at 20 °C, but about 290 g dissolves in the same water at 60 °C. What can he conclude?
Fish and other water animals breathe using
A chilled bottle of soda water can hold more dissolved carbon dioxide than the same bottle at room temperature.
Kavya takes equal amounts of cold water and hot water in two glasses and keeps adding sugar to each, one spoon at a time, while stirring. (a) In which glass can she dissolve more sugar? (b) What does this show?
When a glass of cold water from the fridge is left on a table for some time, tiny bubbles appear on its inner walls. Explain why.
A class studies how much of a solid substance X dissolves in 100 g of water at different temperatures. They make a saturated solution at each temperature and record the mass of X dissolved. The results are shown in the bar graph.
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