U2AoS1 - Redox Reactions Flashcards
What are Redox Reactions?
A reaction that involves the transfer of electrons.
Processes of oxidation and reduction
What are the types of redox reactions?
- Addition/combination reaction
- Decomposition reaction
- Displacement reaction
- Combustion reaction
What is an addition reaction?
A + B – C
What is a decomposition reaction?
c - A + B
What is a displacement reaction?
A + BC – B + AC
What is oxidation?
Loss of electrons
What is reduction?
Gain of electrons
Half equation
electrons shown as either a product or reactant depending on oxidation or reduction
Reductant
Substance that causes another to be reduced and itself oxidised
Oxidant
Substance which causes another to be oxidised and itself reduced
Overall balance equation
Shows products/reactants but not electrons
Ionic equation
Two half equations written together
- no spectator ions
- must be balanced when two added together
Conjugate redox pair
Pair differ by one or more electrons
Oxidised form written first
Are ionic compounds formed through redox reactions?
Transfer of electrons hence, yes
Covalent molecular compounds… are they redox?
- can be involved despite shared
- partial electron transfer, unequal sharing of electrons
Oxidation numbers
determines if a redox reaction has occured