1. 7He
A soluble problem
4 Write down two factors that affect the amount of solid needed to make a saturated solution.

2. 7He
A soluble problem
5 Milk of Magnesia is an indigestion remedy which contains magnesium oxide. How can you tell from the picture that not all the magnesium oxide has dissolved? (Hint: page may help you.)

3. 7He
A soluble problem
6 Are these statements true or false? If you think one is false, explain why.
a) If you add more liquid to a saturated solution, more of the solid will dissolve.
b) If you stir a saturated solution, more of the solid will dissolve.
c) If you heat a saturated solution, more of the solid will dissolve.
d) If you pour the water into a wide, shallow dish, more solid will dissolve.

4. 7He
A soluble problem
4 Write down two factors that affect the amount of solid needed to make a saturated solution.
For example: type of solid, nature of solvent, temperature, volume of solvent.

5. 7He
A soluble problem
5 Milk of Magnesia is an indigestion remedy which contains magnesium oxide. How can you tell from the picture that not all the magnesium oxide has dissolved?
The liquid is cloudy/milky.
If all the solid had dissolved
the liquid would be clear or
transparent (see-through).

6. 7He
A soluble problem
6 Are these statements true or false? If you think one is false, explain why.
a) If you add more liquid to a saturated solution, more of the solid will dissolve.
true
b) If you stir a saturated solution, more of the solid will dissolve.
False. The definition of saturated means that no more solid will dissolve. Stirring only affects the speed of dissolving.

7. 7He
A soluble problem
c) If you heat a saturated solution, more of the solid will dissolve.
true
d) If you pour the water into a wide, shallow dish, more solid will dissolve.
False, the overall volume of water will be the only relevant factor.