Solubility Graphs Worksheet With Answer printable pdf download

Solubility Graphs Worksheet With Answer

Name, Date, Hr/Per_______________________________KEY________________________________________

Solubility Curves

Answer the following questions based on Solubility graph A

1. Why do the temperatures on the graph only go from 0º C to 100º C ?

water is frozen below 0 celcus and is gaseous above 100 celcius

SOLUBILITY GRAPH A

2. Which substance is most soluble at 60º C ?

potassium iodide

3. Which two substances have the same solubility at 80º C ?

potassium chlorate & sodium chloride [both at 40g/100mL water]

4.Which substance’s solubility changes the most from 0º C to 100º C ?

potassium nitrate

5.Which substance’s solubility changes the least from 0º C to 100º C ?

sodium chloride

6. What is the solubility of potassium nitrate at 90º C ?

approximately 200g/100mL of water

7. At what temperature does potassium iodide have a solubility of 150 g/ 100 cm3 water?

approximately 22.5 Celcius

8. You have a solution of sodium nitrate containing 140 g at 65º C. Is the solution saturated,

unsaturated, or supersaturated ?

supersaturated [sodium nitrate is saturated at 130g at 65 Celcius; the point

at 140g & 65 Celcius lies above the saturation curve]

9. You have a solution of potassium chlorate containing 4 g at 65º C. How many additional

grams of solute must be added to it, to make the solution saturated ?

approximately 26 more grams [the solubility of potassium chlorate is

`approximately 30g at 65 Celcius]

10. A solution of potassium iodide at 70º C contains 200 g of dissolved solute in 100 cm

water. The solution is allowed to cool. At what new temperature would crystals begin to

start forming ?

just above 40 degrees [excess solute will come out of solution and

crystallize at any point below the saturation curve]

11. What is the general trend that you see on the graph? Use the IV and DV in your answer.

solubility increases as temperature increases

Solubility Graphs Worksheet With Answer