If half of the water is boiled away, will any solid precipitate or fall out of the solution?

Question

A mass of 100 grams of potassium nitrate is dissolved in 100cm3 of water at 80 degrees C.

Answer 1

Depends on what the solubility of KNO3 is at 80 degrees. At 100 degrees 200 g of KNO3 will dissolve in 100 g of water. If you lose half your water in your example above, then the question becomes "Will 100 g of KNO3 dissolve in 50 g (or close to 50 mL ) of water at 80 degrees celsius. I would say no, you will get some crystallization.

Answer 2

yes because the Dissolved of solid compound in water depends on temperature and if the half of the water boiled away, it mean the concenrtration is tiwced as time as much. each temperature has a satureated point for each compound. so if you lower the temperature some of the solid precipitate will fall out of the solution if it surpass the saturated point at that temperature and concerntration.

Answer 3

i expect that a solid precipitate of potassium nitrate will fall out of solution.