Chapter 13 - Redox Chemistry

Question 1

oxidation is the…

Answer 1

loss of electrons by a substance

Question 2

reduction is the…

Answer 2

gain of electrons by a substance

Question 3

define an oxidant

Answer 3

the reactant in a reduction reaction. Gains the electrons from the oxidation reaction

Question 4

define a reductant

Answer 4

the reactant in an oxidation reaction. loses electrons which are given to the reduction reaction

Question 5

acronym for balancing half equations

Answer 5

KOHES

Key species
oxygen (by water)
hydrogen (by H+0)
electrons
states

Question 6

define corrosion

Answer 6

the oxidation of metals by materials in the surrounding environment

Question 7

what is dry corrosion

Answer 7

where a metal reacts directly with oxygen

Question 8

what is wet corrosion

Answer 8

where a metal reacts directly with oxygen in the presence of water

Question 9

effects of corrosion

Answer 9

loss of tensile strength and elasticity

loss of electrical conductivity

makes substance more brittle

Question 10

3 types of surface protection

Answer 10

coating the metal (to stop substances coming into contact)

alloying (with less corrosive metals to stop corrosion from occurring)

cathodic protection (a more reactive metal sacrificing itself.