Oxidation, Reduction and Redox equations Flashcards
What is oxidation?
The loss of electrons
/Gain of Oxygen
/Loss of Hydrogen
What is reduction?
The gain of electrons
/Loss of Oxygen
/Gain of Hydrogen
What is an oxidising agent?
Species that gains electrons.
What is a reducing agent?
Species that lose electrons.
What are the half equations and the ionic equation for:
SnO + Zn → ZnO + Sn
Half Equations: Sn2+ + 2e- → Sn Zn → Zn2+ + 2e- Ionic Equation: Sn2+ + Zn → Sn + Zn2+
Define oxidation state.
A number which represents the number of electrons lost or gained by an atom of that element in the compound.
What is the oxidation
state of oxygen in OF2?
[O] = +2
What is the oxidation
state of hydrogen in KH ?
[H] = -1
What is the oxidation state of chlorine in NaClO ?
[Cl] = +1
Define the term disproportionation?
Where in a redox reaction, the oxidation states of atoms of the same element, increase for some atoms, whereas decrease
for some atoms.
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 AsO43- ?
[As] = +5
What is the oxidation state of iron in K4Fe(CN)6?
[Fe] = +2
Why is 1s22s22p5 a weaker reducing agent than 1s22s22p63s23p64s2 ?
The 2p electron is closer to the nucleus than the 4s electron. Hence the nuclear attraction is stronger so the 2p electron is lost less easily than the 4s electron.
