Redox reactions Flashcards
(7 cards)
1
Q
How do you know if something is a redox reaction
A
Electrons are transferred
2
Q
What is a redox reaction
A
When REDuction and OXidation happen at the same time
3
Q
In displacement reactions what always happens to the metal ion and metal atom
A
Metal ion- is reduced
Metal atom- is oxidised
4
Q
In Fe + CuSO4 -> FeSO4 + Cu, what are the oxidation and reduction equations
A
Fe —> Fe2+ +2e-
Cu2+ + 2e- —> Cu
5
Q
What bits are shown in ionic equations
A
Only the useful bits
Eg. Mg + Zn2+ —> Mg2+ + Zn
But the full equation is actually:
Mg + ZnCl2 —> MgCl2 + Zn
6
Q
Why are only useful bits in ionic reactions shown
A
Because they are spectator ions, they don’t change
So the equation focuses on which substances are oxidised or reduced
7
Q
A
