Question

i. How do you know that some substances in coffee beans are soluble?
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Answer 1

Explanation:

You've most likely noticed that when you make coffee, some of the compounds from the ground coffee end up in the water, giving it the characteristic color, aroma and flavor that we know as coffee. Solubility of some of the constituents of coffee varies with the temperature of the water.

Answer 2

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You've most likely noticed that when you make coffee, some of the compounds from the ground coffee end up in the water, giving it the characteristic color, aroma and flavor that we know as coffee. Solubility of some of the constituents of coffee varies with the temperature of the water.