redox reactions

Question 1

what is oxidation in terms of electron

Answer 1

a loss of electrons

Question 2

what is reduction in terms of electrons

Answer 2

a gain of electrons

Question 3

what does the phrase OIL RIG stand for

Answer 3

Oxidation Is Loss, Reduction Is Gain

Question 4

what happens to iron atoms when they react with dilute acid

Answer 4

oxidised to Fe2+ ions

Question 5

what is the rule for displacement

Answer 5

a more reactive metal will displace a less reactive metal from its compound

Question 6

what happens if you put iron in a solution of copper sulfate

Answer 6

the more reactive iron will ‘kick out’ the less reactive copper from the solution. you end up with iron sulfate solution and copper metal
iron + copper sulfate – iron sulfate + copper

Question 7

what happens to the electrons of iron and copper in this reaction

Answer 7

iron loses 2 electrons to become a 2+ ion - its oxidised
copper gains these 2 electrons to become cooper atom - its reduced

Question 8

what happens in displacement reactions

Answer 8

always the metal ion that gains electrons and is reduced
the metal atom always loses electrons and is oxidised

Question 9

what happens in an ionic equation

Answer 9

only the particles that react and the products they form are shown
for example : Mg + Zn2+ – Mg2+ + Zn

Question 10

write an ionic equation for the reaction : Zn + FeSo – ZnSO + Fe

Answer 10

Zn + Fe2+ – Zn2+ + Fe
Zn is being oxidised
Fe2+ is being reduced