1.07 Oxidation, Reduction and Redox Flashcards
What is oxidation ?
•The loss of electrons
•Gaining of oxygen
•Loss of hydrogen.
What is reduction ?
•The gaining of electrons
•The loss of oxygen
•The gaining of hydrogen.
What is an oxidising agent ?
Substance that gains electrons (reduction), other species gets oxidised.
What is a reducing agent ?
Substance that loses electrons (oxidised), other species gets reduced.
What are the half equations and ionic equation for the following reaction:
SnO + Zn -> ZnO + Sn
•Sn2+ + 2e- -> Sn
•Zn -> Zn2+ + 2e-
•Sn2+ + Zn -> Sn + Zn2+ .
Define oxidation state
A number which represents the number of electrons lost or gained by an element in a compound
What is the oxidation state of oxygen in OF2 ?
•O = +2
•In most other compounds it will be -2
What is the oxidation state of hydrogen in KH ?
•H = -1
•Hydrogen is usually +1 in most other compounds.
What is the oxidation state of chlorine in NaClO ?
•Cl = +1
•Cl is usually -1, NaClO is formed in a disproportionation reaction.
Define the term disproportionation
Occurs when in a redox reaction the oxidation state of atoms of the same element increases for some atoms but decreases for others
What is the oxidation state of phosphorus in PCl5 ?
P = +5
What is the oxidation state of nitrogen in ammonia ?
N = -3
What is the oxidation state of arsenic in AsO4 3-
As = +5
What is the oxidation state of iron in K4Fe(CN)6 ?
Fe = +2
Why is
