Chapter 3: Chemical composition

Question 1

What are elements?

Answer 1

They are the building blocks o matter that cannot be broken down into simpler substances

Question 2

What are compounds?

Answer 2

Two or more elements that are chemically mixed together

Question 3

What are properties of compounds?

Answer 3

• Different properties from the elements that it is made up of.
• Cannot be separated easily

Question 4

What are mixtures?

Answer 4

Two or more elements or compounds that are physically combined together (no chemical reaction involved)

Question 5

What are properties of mixtures?

Answer 5

Same or similar to their constituents

Question 6

What are solutions? How can we make solutions?

Answer 6

Solute + solvent = solution, by dissolving a solute in a solvent

Question 7

What are factors that affect rate of dissolving?

Answer 7

• size of solute particles
• temperature
• rate of stirring

Question 8

What is solubility?

Answer 8

How well a solute can dissolve in a fixed volume of solvent

Question 9

What affects solubility?

Answer 9

Affected by the type of solute/ solvent

Question 10

What is a suspension?

Answer 10

Suspensions contains insoluble solids in a solvent

Question 11

What is the difference between solutions and suspensions?

Answer 11

The solute is dissolved in the solvent in a solution but does not in a suspension.