Discussion
State whether the following is true or false.
A xerogel and an aerogel differ in how the liquid was removed, not in their chemistry.
Answer: A
A xerogel is dried conventionally and the capillary forces collapse much of the network, while an aerogel is dried supercritically so no meniscus forms and the porous network survives nearly intact. The chemistry of the solid is the same in both cases.
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