Purity & Purifaction

Question 1

What can matter be classifed as

Answer 1

Pure or Impure

Question 2

Define Pure Substance

Answer 2

Has a set chemical composition, and can be either an element or a compound.

Question 3

Examples of Pure Substances

Answer 3

Pure Gold & Pure Water H2O with a 2:1 hydrogen and oxygen ratio

Question 4

Define Element

Answer 4

Substance that cannot be decomposed into simpler substances by ordinary chemical processes. Eg. C, Cl, N2

Question 5

Define Compound

Answer 5

Substance made up of two or more different chemical elements combined in a fixed ratio. Eg. CO2, H2O, CH4

Question 6

What is a element made of

Answer 6

Atoms or Molecules alone

Question 7

What is a compound made of

Answer 7

Both atoms & molecules together

Question 8

2 types of mixtures

Answer 8

Homogeneous mixture = Composition is uniform throughout the mixture. Like Steel, air, rain, etc

Heterogeneous mixture = composition is not uniform throughout the mixture. Like ice in soda, soil, etc