Lesson 3: Mixtures, filtration, crystalization

Question 1

What is a mixture?

Answer 1

• A mixture consists of two or more elements or compounds not chemically combined together.
• Chemical properties of each substance in mixture are unchanged.

Question 2

What is a solute?

Answer 2

A solute is what is dissolving. Eg. salt.

Question 3

What is a solvent?

Answer 3

A solvent is what the solute is dissolving in. Eg. Water.

Question 4

What is a solution?

Answer 4

Solvent + solute
Also known as aqeous: “dissolved in water.”

Question 5

What is meant by soluble?

Answer 5

Soluble means can dissolve in water.

Question 6

What is meant by insoluble?

Answer 6

Insoluble means can’t dissolve in water.

Question 7

What is crytalization?

Answer 7

Crystalisation is a separation technique that is used to separate a soluble solid/salt from a liquid.

Eg, NaCl solution

Question 8

What is filtration?

Answer 8

A separation technique that separates an insoluble solid from a liquid eg. sand and water.

Question 9

What 3 types of mixtures can you have?

Answer 9

• Mixture of compounds
• Mixture of elements
• Mixture of compounds/ elements

Question 10

If I add water to salt, do I change the chemical properties of the salt?

Answer 10

• NO!!
• The chemical properties of each
  substance in the mixture are unchanged.
  spec

Question 11

What type of processes are filtration and crystalization known as?

Answer 11

• They are known as physical processes

Question 12

Give an example of filtration.

Answer 12

AgCl + H20

Question 13

What is chromotography?

Answer 13

• A separation technique where mixtures can be separated based on substances’ solubility.

E.g, separating soluble dyes.