C4.1.6 - Reactivity Of Elements

Question 1

How do metals react with water and dilute acids?

Answer 1

They form positive ions if they are more reactive than hydrogen

Question 2

What do metals react with and what do they produce?

Answer 2

Metal and water to make a metal hydroxide and hydrogen

Metal and acids to produce a salt and hydrogen

Question 3

The more reactive the metal…

Answer 3

…the greater the rate of hydrogen production (more vigorous bubbling)

Question 4

What are metal displacement reactions?

Answer 4

A more reactive metal can displace a less reactive metal from its compound

Question 5

Displacement reactions are examples of…

Answer 5

Redox reactions

Question 6

What is oxidation and what is reduction?

Answer 6

Oxidation - Loss of electrons
Reduction - Gain of electrons

(OIL RIG - OXIDATION IS LOSS REDUCTION IS GAIN)

Question 7

Half equation for oxidation of copper in

Cu(s) + 2AgNO3(aq) —> Cu(No3)2(aq) + 2Ag(s)

Answer 7

Cu(s) —> Cu2+(aq) + 2e-

Question 8

Half equation for reduction of silver in

Cu(s) + 2AgNO3(aq) —> Cu(No3)2(aq) + 2Ag(s)

Answer 8

Ag+(aq) + e- —> Ag(s)

Question 9

List the reactivity series from most reactive to least

Answer 9

Potassium
Sodium
Calcium
Magnesium
Aluminium
Zinc
Iron 
Tin
Lead 
Hydrogen
Copper
Silver
Gold
Platinum

Question 10

Name some patterns of reactivity in the periodic table

Answer 10

Elements in group 0 do not react
Reactive non-metals may form covalent compounds with each other
Metals may form ionic bonds with reactive non-metals
Metals in groups 1 and 2 are more reactive than transition metals and other metals.
Metals in group 1 and 2 become more reactive down the group
Non-metals in group 7 become less reactive down the group