Chemistry 7-8

Question 0

Enzyme?

Answer 0

Breaks things down

Question 1

Catalyst?

Answer 1

A substance added to speed up rate of reaction

Question 2

Inhibitors ?

Answer 2

A substance added to slow speed of the rate of reaction

Question 3

Corrosive ??

Answer 3

Oxidation of metals and rocks in the presence of air and moisture

Question 4

Combustion?

Answer 4

Highly exothermic reaction, a combination of the substance with oxygen

Question 5

5 ways to increase rate of reaction ?

Answer 5

1. Add heat
2. Agitation (stirring)
3. Increase surface area
4. Increase the concentration of reaction
5. Add a cation

Question 6

What’s corrosive?

Answer 6

Rusting. Oxidation of metals in the presence of air and moisture (salt speeds up rusting) and iron and oxygen are reactants that promote it

Question 7

What’s combustion? And products of combustion ?

Answer 7

Carbon dioxide, and it’s a highly exothermic reaction, a combination of the substance with oxygen (required heat)

Question 8

What’s endothermic ?

Answer 8

Chemical reactions that gives off energy, ex. fire

Question 9

What’s exothermic ?

Answer 9

Chemical reaction that absorbs energy (heat) ex. Cooking

Question 10

What are reactants ?

Answer 10

Chemicals mixed together to create something else ex hydrogen + oxygen-hydrogen monoxide (hydrogen + oxygen)

Question 11

What are products?

Answer 11

Substances produced by a chemical reaction ex. Hydrogen + oxygen - hydrogen monoxide (hydrogen monoxide)

Question 12

Example of a word equation?

Answer 12

Magnesium + oxygen - magnesium oxide + light (this would be exothermic)

Question 13

What are the symbols used for these reactants? Solid, liquid, gas, Aquious

Answer 13

Solid - (s)
Liquid - (l)
Gas - (g)
Aquious- (aq)