Why does instant coffee dissolve but regular ground coffee does not?
In: Chemistry
Some of the ground coffee does dissolve and some don’t. You can easily tell the difference between fresh and spent coffee as the consistency and color are very different. This is because when you brew coffee you are dissolving the volatile parts of the coffee grounds, such as the caffeine but also color and taste compounds. Instant coffee is made by first brewing regular coffee and then drying it. So all the volatiles in the coffee end up as a powder again. Instant coffee is therefore regular coffee without the spent coffee grounds.
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