CHEMESTRY

Question 1

WHMIS—symbols, reason to have it—MSDS

Answer 1

W - Workplace 
H - Hazardous
M - Materials
I - Information
S - System

system of simple, universal warning symbols

Question 2

Explain physical and chemical properties? How do properties of a chemical change when in a solution or mixture compared to pure substances?

Answer 2

physical - change that does not create a new substance - change of state
chemical - when two or more materials react and a new material is formed - change in colour & odour, formation of solid or gas, relases or absorbs energy

Question 3

What are the three states of matter? State changes are???

Answer 3

solid, gas, liquid

solidification, fusion, evaporation, condensation, sublimation, deposition

Question 4

Particle theory of matter states…

Answer 4

• all matter is made up of extemely tiny particles
• each pure substance has its own kind of particle, different from the particles of other pure substance
• particles attract each other
• particles are always moving
• particles at a higher temperature move faster on average than particles at lower temperature

Question 5

Use the flow chart of matter to classify heterogeneous and homogeneous substances. Give examples of each.

Answer 5

matter

mixture and pure substance
heterogeneous and homogenous mixture | element and compound
mechanical mixture
suspension
colloid

Question 6

Chemical versus physical changes? What is your first question to ask (5 clues are… as proof)

Question 7

Physical properties and classifying them as qualitative vs. quantitative.

Question 8

What are compounds and elements? How is a chemical symbol different from a chemical formula? Explain the components of a chemical formula.

Question 9

Explain the “Law of Conservation of Mass”. How can you use it to explain a loss or gain of mass in a chemical reaction? (open vs. closed system)

Question 10

What is the “Law of Definite Composition.”

Question 11

What is Dalton’s atomic theory?

Question 12

Briefly explain the history of atomic models.

Question 13

What are atoms? What are atoms made of?

Question 14

Elements can be classified into these three groups and what are the properties of each?

Question 15

What is a chemical family? Group? Period?

Question 16

What are the properties of Alkali metals, Alkaline Earth Metals, Noble Gases and the Halogens? Where are they found on the periodic table?

Question 17

Who is Mendeleev? Why is he important to the world of science?

Question 18

Using the periodic table find protons, neutron, electron and draw and atom (What is in the nucleus?)

Question 19

Make a table to compare IONIC and MOLECULAR compounds. How do you name each of these compounds?

Question 20

In a chemical reaction reactants react to produce products. Can you recognize these components of a word equation?

Question 21

Convert a word equation into a chemical equation.

Question 22

What is combustion? What are the reactants and products of combustion?

Question 23

What is an exothermic and endothermic reaction? Give some examples.

Question 24

What three factors affect the Rate of a Chemical Reaction?

Question 25

Catalysts, enzymes, inhibitors. What are they? What do they do?

Question 26

Write an equation for corrosion and explain how you can prevent it.

Question 27

Naming ionic and molecular compounds, writing formulas