acids and alkalis

Question 1

what is the pH range of an acidic solution?

Answer 1

0-6

Question 2

what is the pH range of an alkaline solution?

Answer 2

8-14

Question 3

what is the pH of a neutral solution?

Answer 3

7

Question 4

what solution conducts electricity?

Answer 4

acidic

Question 5

why do acidic solutions conduct energy?

Answer 5

due to the presence of charged particles/ions

Question 6

acids

Answer 6

H+ ion

Question 7

what is the test for hydrogen gas?

Answer 7

burns with a pop

Question 8

alkalis

Answer 8

OH- hydroxide ion

Question 9

an acidid solution contains?

Answer 9

more H+ ions than OH- ions

Question 10

a neutral solution contains?

Answer 10

an equal concentration/number of H+ and OH- ions

Question 11

an alkaline solution contains?

Answer 11

more OH- ions than H+ ions

Question 12

what happens when a solution is diluted?

Answer 12

concentration decreases

Question 13

what happens when an acid is diluted?

Answer 13

the pH increases as concentration of hydrogen ions decreases

Question 14

what happens when an alkali is diluted?

Answer 14

the pH decreases as the concentration of hydroxide ions decreases

Question 15

how are acids made?

Answer 15

by dissolving soluble non metal oxides in water

Question 16

how are alkalis made?

Answer 16

by dissolving soluble metal oxides and hydroxides in water

Question 17

what is neutralisation?

Answer 17

production of water through the reaction of an acid with a base

Question 18

what is another word for an alkali?

Answer 18

base

Question 19

what are the three bases?

Answer 19

• metal oxides
• metal hydroxides
• metal carbonates

Question 20

how can a dry sample of salt be collected?

Answer 20

evaporation

Question 21

acid + metal hydroxide ->

Answer 21

salt + water

Question 22

acid + metal carbonate ->

Answer 22

salt + water + carbon dioxide

Question 23

acid + metal oxide ->

Answer 23

salt + water

Question 24

how are soluble salts made?

Answer 24

by neutralisation reactions

Question 25

how are insolube salts made?

Answer 25

by precipitation reaction

Question 26

what is precipitation?

Answer 26

chemical reaction where two solutions react to form an insoluble solid

Question 27

what is the insoluble solid called?

Answer 27

precipitate

Question 28

neutralisation makes?

Answer 28

soluble salts

Question 29

precipitation makes?

Answer 29

insoluble salts

Question 30

what are spectator ions?

Answer 30

present in a chemical reaction but remain unchanged on both sides