C4 - Chemical Change

Question 1

What do acids form in water

Answer 1

H^+ ions

Question 2

What is a base

Answer 2

A substance that reacts with water to form water and salt

Question 3

What is an acid

Answer 3

A substance that forms aqueous solutions with a pH of less than 7

Question 4

What is an alkali

Answer 4

A base that dissolves in water to form a solution with a pH greater than 7.
Form OH^- ions in water

Question 5

Neutralisation

Answer 5

Acid + Base -> Salt + Water

Question 6

Neutralisation between acids and alkalis

Answer 6

H^+ (aq) + OH^- (aq) -> H2O (l)

Question 7

What does Titration show

Answer 7

Concentration of solutions

Question 8

What do Alkalis form in water

Answer 8

OH-

Question 9

How can you determine the pH of a solution

Answer 9

pH probe or Universal Indicator

Question 10

Reactivity Series

Answer 10

Potassium
Sodium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Silver
Hold

Question 11

Acid + Metal Oxide -> …

Answer 11

Salt + Water

Question 12

Acid + Metal Hydroxide -> …

Answer 12

Salt + Water

Question 13

What does Hydrochloric Acid form

Answer 13

Chlorides

Question 14

What does Sulfuric Acid form

Answer 14

Sulfates

Question 15

What does Nitric Acid form

Answer 15

Nitrates

Question 16

Acid + Metal Carbonate ->

Answer 16

Salt + Water + Carbon Dioxide

Question 17

3 Weak Acids

Answer 17

Carbonic
Ethanoic
Citric