ox and reduction Flashcards
what happens when an atom undergoes oxidization?
loses electron/has a more positive charge
what happen to an atom when it is the reduction agent?
it is oxidizing/ loosing electrons
what happens when an atom undergoes reduction?
gains electrons/ more negative charge
what happen to an atom when it is the oxidation agent?
undergoes reductions/ gains electrons/ more negative charge
how do you determine which atom gets priority over charge?
the most electronegative charge
what oxidation state do Free elements have?
none/0
what charge does monoatomic ions have?
the charge displayed/given to them
what should the sum of the oxidation states add up too?
0/ they should cancel out unless told otherwise
when making oxidation half-reaction which sides do the electrons go on?
product side
when making reduction half-reaction which sides do the electrons go on?
reactant side
when making reduction half-reaction which sides do the electrons go on?
reactant side
when the two half equations add together what charge should it have?
o/ given charge
skip
ship
what are the steps to balancing half reactions by mass?
1) First balance atoms other than O and H.
2) Balance O by adding H2O to side that lacks O.
3) Balance H by adding H+ to side that lacks H.
4) Finished if in acidic solution.
5) If in basic solution, add enough OH− to neutralize the H+, rewrite H+ + OH− as H2O.
6) Add to both sides.
7) Then cancel H2O on both sides.
what are the steps to balancing half reactions by charge?
1) add electrons on the product side for the oxidation agent
2) add electrons on the reactant side for the reduction agents
when do Displacement reactions happen?
when a stronger reducing agent replaces a weaker reducing agent. The reactivity series below list metals from strongest to weakest reducing agent
how do you check if something is a spontaneous reaction?
e(cell)=e(red) - e(oxd) needs to end up as a positive
what is the cathode?
the reduction agent
what is the anode?
the oxidizing agent
on which side is the cathode put on?
right/ product side
in which order is the anode presented?
left/ reactant side
what is the salt bridge?
ions that are not contributing just helping ions flow through
what other atom have to be in a solution in a electrochemical reaction
something that will return to the original charge
what is the redox method?
- Find the appropriate half-equations on the electrochemical series.
- Identify the chemical species that are reacting.
3.The strongest oxidant (top left) will react with the strongest reductant (bottom right) spontaneously. This is summarised in the ‘S’ configuration of Figure1.
4.Reduction is on the top of the S and oxidation is on the bottom (hence, RED SOX).