C4 - Chemical Changes

Question 1

What does molten mean

Answer 1

Melted

Question 2

Will NaCl (aq) conduct electricity

Answer 2

Yes

Question 3

Electrolysis

Answer 3

Method of extracting a metal more reactive than carbon using electricity

Question 4

Electrolyte

Answer 4

A liquid or solution that contains ions

Question 5

What is reactivity

Answer 5

How vigorously a substance reacts

Question 6

How do metals get ordered by reactivity

Answer 6

By comparing their reactions with water, acid, oxygen

Question 7

How can non-metals be used to reduce metal oxides

Answer 7

By carbon and hydrogen displacing less reactive metals

Question 8

Ore

Answer 8

A material containing enough metal in it for it to be economically worthwhile to extract the metal

Question 9

Reduction

Answer 9

• removal of oxygen
• gain of electrons

Question 10

Neutralisation reaction

Answer 10

Reaction between an acid and base

Question 11

Products when acids react with base

Answer 11

Salt + water

Question 12

Oxidation

Answer 12

• gain of oxygen
• loss of electrons

Question 13

Products when metal and acid react

Answer 13

Salt + hydrogen

Question 14

Displacement reaction

Answer 14

A reaction where a more reactive element takes the place of a less reactive element in a compound

Question 15

Why is pure gold found naturally

Answer 15

It’s not reactive enough to form a compound

Question 16

How are metals less reactive than carbon extracted

Answer 16

Their oxides are reduced using carbon to form carbon dioxide and the pure metal