Question

Cindy left a small glass of salt water outside on her windowsill on a warm day. She remembered the glass a couple days later, but when she went to get it, she discovered that the water was gone and all that was left in the glass was a layer of salty residue. If the salt and water were well mixed when Cindy took the glass outside, how did this happen?

Answer 1

The salt ions and water molecules remained separate, and the water evaporated while the salt did not.

Step-by-step explanation:

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Answer 2

When the glass of salt water was outside, the water evaporated leaving behind the minerals, in this case, salt.