Reactivity of Metals (4.1) (M)

Question 1

Metals react with oxygen to produce…

Answer 1

metal oxides

Question 2

What type of reaction is the one that forms metal oxide from a metal and oxygen? Why?

Answer 2

oxidation reactions

because the metals gain oxygen

Question 3

What is oxidation? (in terms of oxygen)

Answer 3

gain of oxygen

Question 4

What is reduction? (in terms of oxygen)

Answer 4

loss of oxygen

Question 5

When metals react with other substances the metal atoms form (…) ions

Answer 5

positive

Question 6

The reactivity of a metal is related to what?

Answer 6

its tendency to form positive ions

Question 7

Metals can be arranged in order of their reactivity in a (…)

Answer 7

reactivity series

Question 8

Give the reactivity series order

Answer 8

• The metals potassium, sodium, lithium, calcium, magnesium, zinc, iron and copper can be put in order of their reactivity from their reactions with water** and **dilute acids*
• The non-metals hydrogen and carbon are often included in the reactivity series*

Question 9

A more reactive metal can (…) a less reactive metal from a compound

Answer 9

displace

Question 10

Describe the reactions, if any, of potassium, sodium, lithium, calcium, magnesium, zinc, iron and copper with water and dilute acids

Answer 10

Question 11

How are metals put in order of reactivity?

Answer 11

from their reactivity from their reactions with water and dilute acids

Question 12

A metal with a (…) tendency to form a positive ion will react more vigorously/at faster rate with water/dilute acid

Answer 12

greater

Question 13

The reactions of metals with water and acids are limited to (…) and do not include reactions with (…)

Answer 13

room temperature

steam

Question 14

What type of metals are found in the Earth as the metal itself?

Answer 14

Unreactive metals

Question 15

What is a common example of an unreactive metal found in the Earth as the metal itself?

Answer 15

Gold

Question 16

most metals are found as (…) that require (…) to extract the metal

Answer 16

compounds

chemical reactions

Question 17

How can metals less reactive with carbon be extracted from its compound?

Answer 17

They can be extracted from their oxides by reduction with carbon

Question 18

How may a metal more reactive than carbon be extracted from its compound?

Answer 18

Through electrolysis

Question 19

copper(II) oxide + hydrogen ⇢ copper + water

What has been oxidised, what has been reduced

Answer 19

Copper - reduced

Hydrogen - oxidised

Question 20

What is oxidation (in terms of electrons)?

Answer 20

Loss of electrons

Question 21

What is reduction (in terms of electrons)?

Answer 21

gain of electrons

Question 22

Write the full ionic equation for this:

Mg(s) + CuSO₄(aq) ⇢ MgSO₄(aq) + Cu(s)

Answer 22

Mg + Cu²⁺ ⇢ Mg²⁺ + Cu

Question 23

Give the half equations and what is reduced/oxidised in this reaction?

Mg(s) + CuSO₄(aq) ⇢ MgSO₄(aq) + Cu(s)

Answer 23

Oxidation: Mg ⇢ Mg²⁺ + 2e^-

Reduction: Cu²⁺ + 2e^- ⇢ Cu