Redox Reactions

Question 1

Redox reaction

Answer 1

chemical reaction that involves the transfer of electrons between two species

Question 2

Reduction

Answer 2

chemical reaction where a species decreases its oxidation number by gaining electrons

Question 3

Oxidation

Answer 3

chemical reaction where a species increases its oxidation number by losing electrons

Question 4

Oxidising agent

Answer 4

species that oxidises another substance and is itself reduced

Question 5

Reducing agent

Answer 5

species that reduces another substance and is itself oxidised

Question 6

Conjugate redox pair

Answer 6

electron donor (reducing agent) and its corresponding electron acceptor (oxidising agent)

Question 7

Galvanic cell

Answer 7

electrochemical cell in which chemical energy from spontaneous redox reactions is converted into electrical energy

Question 8

Anode

Answer 8

negatively charged electrode in a galvanic cell where oxidation occurs

Question 9

Cathode

Answer 9

positively charged electrode in a galvanic cell where reduction occurs

Question 10

Fuel cells

Answer 10

electrochemical cell that continuously converts chemical energy into electrical energy by a redox reaction

Question 11

Porous electrode

Answer 11

material with many holes (pores) which is used in a fuel cell to maximise the ability for gaseous reactants to come into contact with the electrolyte