Metals, Acids, Bases and Salts

Question 1

What do strong acids do?

Answer 1

Fully ionise

Question 2

What do weak acids do?

Answer 2

Partially ionise

Question 3

What is an acid?

Answer 3

Substances that give H+ ions in water

Question 4

What does a base do?

Answer 4

Neutralise acids

Question 5

Metal oxide, metal hydroxide and metal carbonate are examples of what?

Answer 5

Bases

Question 6

Salt required practical

Answer 6

Making Salt Crystals:

1. Measure 25cm^3 of acid
2. Gently warm acid
3. Add base in excess
4. Filter excess base away
5. Evaporate water slowly from solution to get crystals

Question 7

What is more reactive the top or bottom of the reactivity series?

Answer 7

Top

Question 8

What is less reactive the top or bottom of the reactivity series?

Answer 8

Bottom

Question 9

What practical do you use to decide the reactivity of metals?

Answer 9

Displacement reaction

Metal + acid —> Salt + hydrogen

Question 10

Test for hydrogen

Answer 10

Bring burning splint near gas. If hydrogen is present you will hear a squeaky pop

Question 11

Test for carbon dioxide

Answer 11

Bubble through lime water. If carbon dioxide is present lime water turns cloudy

Question 12

Nitric acids are called

Answer 12

Nitrates

Question 13

Hydrochloric acids are called

Answer 13

Chlorides

Question 14

Sulphuric acids are called

Answer 14

Sulphates