a1.1 chem

Whmis

Workplace hazardous materials information system- symbols of possibly dangerous chemicals

Hhps

Household hazardous materials information symbols- symbols of possibly dangerous household products

Ppe

Personal protective equipment- gear used for protection and handling chemicals

Msds

Materials safety data sheet- A sheet consisting of

-how to handle chemicals in a lab

-information on the physical and chemical properties of said chemicals

Categories of whmis labels

Health, physical, environmental

Ghs vs whmis

Ghs has new symbols that whmis doesnt have

Msds- for whmis

Sds- for ghs

Physical properties (7)

Description appearance-wise, physical properties include-

1) colour

2) conductivity

3) state

4) boiling/freezing point

5) ductility

6) malleability

7) solubility

Whats ductility

Ability to turn into wires

What’s malleability

Ability to turn into metal sheets

What’s solubility, solvents and solute?

Ability to dissolve

Solvent- dissolver

Solute- dissolved

Chemical properties (4)

Reactivity of a substance- to be able to create a new substance. this includes

1) ability to burn

2) ph (acidity)

3) radioactivity

4) corrosiveness

Chemical reactions (4)

Reactants that undergo a transformation to make a new substance/product, these transformations can include

1) fizzing

2)colour change

2) precipitate (solids)

4) energy release

Types of energy releases (exothermic)

Heat, sound, light

Whats matter?

Anything that has mass and takes space

Whats a mixture

A combo of at least two pure substances

Solutions?

Separate components in mixture are not visible (homogenous)

Mechanical mixtures?

Components in mixture are visible (heterogeneous)

Suspensions?

Mix where components mixed are different states (heterogeneous)

Colloids

Substances arent easily separated (heterogeneous)

Whats a pure substance?

All particles that make up a substance are identical

Elements

Cannot be broken down into smaller pieces- can be found in periodic table

Compound

Chemical mix of 2 or more elements

Food chemistry

Physical- heating, freezing, salting

chemical- fermentation (uses other bacteria)

Bohr

Determined the nucleus contains protons and neutrons and electrons orbited them. This however, only worked for the first 20 elements.

Levels

1: 2

2: 8

3: 8