Redox reactions Flashcards
state what is means by the term REDOX reaction.
A reaction in which the oxidation states of all the oxidising agents change.
Which type of reactions are not redox reactions, and explain why.
- Atoms with the same elctronegativity.
- Acid-base reactions are not redox, this is because the oxidation states, dont change
- Double displacement reactions, this is because the oxidation states havent changed.
What is one thing you need to be really carefull when asked, “what is the oxidising agent”
Make sure you say the entire reactant.
What is oxidation?
When something gains electrons in a reaction, we call it the oxidising agent.
When an elements oxidation state, increases, we say it has been oxidised.
What is reduction?
When something loses electrons, we say it is the reducing agent.
When an elements oxidation state, decreases, we say it has been reduced.
how many oxidation state rules, are there?
9 total rules.
what is rule number 1
Uncombined elements have an oxidation state of 0.
what is rule number 2
in a monoatomic ion, its oxidation state is equal to its charge.
what is rule number 3
for compounds, the sum of the oxidation states, is equal to the overall charge of the compound.
what is rule number 4
group 1 atoms in a compound, always have and oxidation state of +1.
what is rule number 5
group 2 atoms in a compound, always have the oxidation state +2.
what is rule number 6
Flourine in a compound, always has the oxidation state -1.
what is rule number 7
hydrogen in a compound, always has the oxidation state of +1.
What is rule number 8?
oxygen in a compound, has an oxidation state of -2.
What is rule number 9?
Chlorine in a compound, has an oxidation state of -1.
