1. Mixtures and Solutions Investigation 1

2. Let’s talk about our results
Which mixtures were separated by the screen?
Gravel
Which mixtures were separated by the filter?
Powder
How are the screen and filter similar?
The both separate mixtures.

3. LOL A mixture is two or more materials stirred together.
A property is a characteristic of an object, something you can observe such as size, color, shape, or texture.
A solution is a special mixture formed when a material dissolves in water.
Dissolving is the process in which one material disperses uniformly into another material, so that the first material seems to disappear.
Print and glue in

4. Water and solid material make a mixture.
LOL cont.
Water and solid material make a mixture.
Some mixtures can be separated with filters.
Print and glue in.

5. LOL:

6. LOL:

7. LOL

8. LOL
Vocabulary:
Evaporation causes liquids to dry up- the liquid turns to a gas and disperses into the air, leaving any dissolved solid material behind.
A crystal is the solid form of a material that can be identified by its properties, such as shape, color, and pattern.
Content:
How can a solution be separated? When a solution evaporates, it leaves the dissolved solid behind
How can the material left behind by evaporation be identified? If the evaporation material forms a crystal, it can be identified by its properties, such as shape and pattern.

10. Mixtures and Solutions Investigation 2: Reaching Saturation

11. Title: Salt Saturation
Investigation 2.1

12. Q? – How much salt can you dissolve in 50 ml of water? Pre-
Purpose: To gain experience with the concept of saturation.
Q? – How much salt can you dissolve in 50 ml of water?
Pre-

13. LOL: Word Bank: A solution is made of two parts, the solvent and
the solute.
Solvent is the liquid
Solute- is the solid that dissolves in the solvent
When a solute dissolves in a solvent until no more will dissolve, the result is a saturated solution

14. LOL:
Content:
1. Is there a limit to the amount of salt that will dissolve in water?
Salt will dissolve until it reaches saturation. No more salt will dissolve once saturation is reached.
2. How can you determine the amount of salt present in a saturated volume of water?
The amount of salt in a saturated solution can be determined by weighing the saturated solution and subtracting the mass of the water.

15. Title: Citric-Acid Saturation
Investigation 2.2

16. Purpose: To gain experience with the concept of saturation using citric acid
Q? – How much citric acid is needed to saturate 50 ml of water?

17. LOL:
Word Bank:
Solubility is the property that substances have of dissolving in solvents, such as the solubility of salt in water.
Content:
Which is more soluble in water, salt or citric acid?
Citric acid is about four times more soluble in water than salt is.