Chemical Changes

Question 1

What is oxidation

Answer 1

Gain of oxygen

Question 2

What is reduction

Answer 2

Loss of oxygen

Question 3

How are positively ions formed?

Answer 3

When metals lose electrons when they react with other substances.

Question 4

Order the reactivity series from most reactive to least reactive. (8 elements)

Answer 4

Potassium
Sodium
Lithium
Calcium
Magnesium
Zinc
Copper
Iron

Question 5

What do Potassium, Sodium, Lithium and Calcium react with?

Answer 5

Water

Question 6

What elements in the reactivity series don’t react either water?

Answer 6

Magnesium, Zinc, Copper, Iron.

Question 7

What elements in the reactivity series react with dilute acids?

Answer 7

Potassium
Sodium
Lithium
Calcium
Magnesium
Zinc
Iron

Question 8

What gas is given off if a metal reacts with water/dilute acids?

Answer 8

Hydrogen

Question 9

In the reactivity series, is it more or less reactive going down the group?

Answer 9

Less

Question 10

In the reactivity series, are electrons lost more or less easily going down the group?

Answer 10

Less

Question 11

What metal is less reactive than hydrogen in the reactivity series

Answer 11

Copper

Question 12

What are Potassium, Sodium, Lithium, Calcium, Magnesium and Aluminium more reactive tha

Answer 12

Carbon

Question 13

What metals can be extracted by electrolysis?

Answer 13

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium

Question 14

What metals in the reactivity series are less reactive than carbon?

Answer 14

Zinc
Iron
Copper
Silver
Gold
Platinum

Question 15

How can Zinc, Iron, Copper, Silver, Gold and Platinum be extracted?

Answer 15

Heating with Carbon

Question 16

What are Gold, Silver and Platinum?

Answer 16

Native metals (found in the Earth’s Crust)

Question 17

What are the 4 most common metals in the reactivity series

Answer 17

Aluminium
Silver
Gold
Platinum

Question 18

What is carbon?

Answer 18

A non-metal

Question 19

What do ores often contain?

Answer 19

Metal Oxides, or compounds that can be converted into metal oxides

Question 20

How can oxides in metals be reduces if they’re less reactive than carbon?

Answer 20

They can be reduced by heating with carbon.

Question 21

What salt is produced when Magnesium and hydrochloric acrid react?

Answer 21

Magnesium chloride
(Colourless)

Question 22

What salt is produced when Magnesium and sulfuric acrid react?

Answer 22

Magnesium sulfate
(Colourless)

Question 23

What salt is produced when Zinc and hydrochloric acid react?

Answer 23

Zinc chloride
(Colourless)

Question 24

What salt is produced when Magnesium and sulfuric acrid react?

Answer 24

Zinc sulfate
(Colourless)

Question 25

What salt is produced when Iron and hydrochloric acid react?

Answer 25

Iron Chloride (Green solution)

Question 26

What salt is produced when iron and sulfuric acid react?

Answer 26

Iron sulfate (Green solution)

Question 27

What do metals react with to produce salts and hydrogen?

Answer 27

Acids