Question

1)20 mL of a saturated of potassium nitrae at 50oC. Approximately, what mass of solid will precipiatae from the solution?

2)At 80oC, what mass of sodium dissolves in 1.0L of water

3.What minimum temperature is required to dissolve 24 g of potassium nitrate in 40 g of water? is cooled to 20oC.

Answer 1

Surely you have a table or a graph in your text or notes. I don't have solubilities of every salt memorized.

Answer 2

okay, thank you, but i don't understand number two

Answer 3

I don't either. Unless the idea is that Na will react with H2O to form NaOH and you have a table or graph that tells you the solubility of NaOH. If you have that I can help further.

Answer 4

At 80oC, what mass of sodium chloride dissolves in 1.0L of water

Answer 5

sorry, i made a mistake