Hakan put three different samples of water in dishes and left them in a room at 20°C. There was the same amount of water in each dish.

After two days there was no water in the dishes.
There was some white solid left in each dish.
a. Explain why there was no water in any of the dishes after two days.

b. There was more white solid in dish A than in dish B or dish C.
Explain why there was more white solid in dish A.

c. Hakan then poured water into dish A and stirred it.
What happened to the white solid?