Question

a mass of 10g of sodium nitrate is dissolved in 10ml of water at 80 degrees celsius, at what temperature will it start to precipitate?

Answer 1

you have 100g/100g water.

see this chart: http://s3.amazonaws.com/answer-board-image/20094272405633763968056360000503.jpg

Looks to me about 35C it crosses 100g/100g

Answer 2

41-44