Chemistry Grade 10

Question 1

Synthesis

Answer 1

A + B = AB

Question 2

Decomposition

Answer 2

AB = A + B

Question 3

Single Displacement

Answer 3

AB + C = A + BC

Question 4

Double Displacement

Answer 4

AB + CD = AD + CB

Question 5

Combustion of an Element

Answer 5

Metal + Oxygen = Metal Oxide + Energy

Question 6

Combustion of a Hydrocarbon

Answer 6

CxHy + O2 = CO2 + H2O

Question 7

Incomplete Combustion

Answer 7

CxHy + O2 = C + CO + CO2 + H2O

Question 8

Evidence of Hydrogen

Answer 8

Lit splint pops

Question 9

Evidence of Oxygen

Answer 9

Glowing splint relights

Question 10

Antacid

Answer 10

Reduces stomach acid, helping with heartburn

Question 11

Buffer

Answer 11

A substance able to resist changes in pH

Question 12

Releases OH

Answer 12

Base

Question 13

Releases H

Answer 13

Acid

Question 14

Receives H

Answer 14

Base

Question 15

Electrolytes

Answer 15

A substance that breaks down into ions when dissolved in water

Question 16

Products of neutralization

Answer 16

Salt, Water

Question 17

Plants remove toxins in soil

Answer 17

Phytoremediation

Question 18

When acid forming chemicals fall onto surfaces

Answer 18

Dry deposition

Question 19

Reaction w/ carbonate

Answer 19

Makes CO2

Question 20

Phenolphthalein

Answer 20

Acid - No color
Base - Pink

Question 21

Bromothymol Blue

Answer 21

Acid - Yellow
Base - Blue

Question 22

Phenol Red

Answer 22

Acid - Yellow
Base - Red/Pink

Question 23

Methyl Orange

Answer 23

Acid - Red
Base - Orange/Yellow

Question 24

Common acids

Answer 24

Acetic Acid (HC2H3O2)
Hydrochloric acid
Sulfuric acid
Carbonic Acid

Question 25

Common Bases

Answer 25

Sodium Hydroxide Calcium hydroxide Magnesium hydroxide

Question 26

Make acid/base

Answer 26

-Combustion of element to make an oxide -Combine oxide with water in synthesis reaction

Question 27

Acid per. Environment impact

Answer 27

-Damage forests (Weaken trees) -Makes soil acidic -pH change affects aquatic ecosystem

Question 28

Acid per. economic impact

Answer 28

-Logging industry -Fishing industry -Structural damage

Question 29

How to prevent corrosion

Answer 29

-Protective layer (eg. paint) -Non corrosive material -Galvanize (Zinc layer)

Question 30

Exothermic

Answer 30

Energy is a product

Question 31

Endothermic

Answer 31

Energy is a reactant