Name ______

Solubility Notes

In the diagram above ______is the solvent, ______is the solute and

______is the solution formed. Salt is ______in water

so it will dissolve. When no more salt will dissolve in the water the solution is

______. Chalk is insoluble in water so it will not ______.

(You will need to know what these words mean for the test.)

Solubility Experiment

Aim

The purpose of this experiment is to list 5 different chemicals in order of their solubility.

Method

1.  Use a measuring cylinder to measure out 5 x 25cm3 of water into 5 different boiling tubes placed in a rack.

2.  Add half a spatula of a solid to a boiling tube, place a bung in the top and shake.

3.  If this dissolves, remove the bung, add a whole spatula of solid to the boiling tube, replace the bung and shake.

4.  Repeat step 3. until a saturated solution is formed and some solid remains at the bottom of the boiling tube.

Results Table

Solid
name
Number of spatulas that dissolve
Order of solubility

Conclusion

Different Types of Solutions

Not all solutions contain a solid dissolved in a liquid!

Type of Solution / Example: Name of solution / Solvent / Solute(s) and state
Liquid-gas / Carbonated water
Diet coke / Water (liquid)
Water (liquid) / Carbon dioxide (gas)
Carbon dioxide (gas), sugar, caramel, caffeine, food colouring, acetic acid, flavoring
Liquid-liquid / Vinegar
Coloured water / Water (liquid)
Water (liquid) / Acetic acid (liquid)
Red dye (liquid)
Gas / Earth’s atmosphere / Nitrogen (gas) / Oxygen, carbon dioxide, argon (gasses)
Solid / Brass
steel / Copper (solid)
Iron (solid) / Zinc (solid)
Carbon (solid)

(Pages 623-625 will help you complete this table.)

Solubility And Temperature

1. What general pattern do you notice about how the solubility of solids changes with temperature?

The solubility of solids increases with increasing temperaure__

2. Which is the most soluble solid? Sucrose is the most soluble______

3. The solubility of sucrose changes the most as the temperature is increased.

4. Calcium carbonate is insoluble at all the temperatures shown.

5.  What is the solubility of potassium chloride at 40oC? 40 g/100g water_

6.  How much potassium chloride could dissolve in 50g water at 40oC?

40 g/100g water_therefore 20g could dissove in 50 grams of water______

7.  How much sugar could dissolve in 1kg of water at 20oC?

1kg=1000g_____200g/100g water__therefore 2000 g of sucrose can dissolve in 1kg of water______

8.  How does the solubility of liquid-gas solutions change with temperature?

As temperature increases the solubility of gasses decreases (page 629 will help you with this)

9.  What would you see happening to a cola drink if you warmed it up? ______

______

Homework questions: page 646 questions 1-7,10,11,13,26,27.

AL 2011 Solubility