Chapter 2: Solubility Part 1 Page 3 SABIS Grade 11 (Level M) Chemistry

Using the graph, answer the following question: 

What mass of potassium nitrate forms if a saturated solution in 100 g of water is cooled from 40°C to 10°C? From 60°C to 20°C?

From 40°C to 10°C, the mass of potassium nitrate that forms is

             Choose...             42 g.             74 g.         

From 60°C to 20°C, the mass of potassium nitrate that forms is

             Choose...             42 g.             74 g.         

Using the graph, answer the following questions:

What mass of water is needed to dissolve 50 g of potassium nitrate at 40°C? Give your answer to 2 significant figures.

Mass of water =

 g

part 1 page 4