Oxidation Reduction Flashcards
Reduction
The gain of electrons
- dec. oxi number in products
Reactivity Series of Reducing Agents properties
- Metals higher in the series can displace metal ions lower in the series
- The more readily the metal loses its outer e- the more reactive it is
- Inc. reactivity going up
Voltage
Depends on the relative diff. between two metals in reactivity series
Where does the negative electrode occur and the positive electrode?
Negative occurs at oxidation
Positive occurs at reduction
Electrolyte
Substance which does not conduct electricity when solid, but does when molten
In an Electrolytic Cell oxidation occurs where?
Oxidation occurs at positive electrode and is anode!
Factors affecting the discharge of ions during electrolysis?
- Position in the electrochemical: the lower the more readily reduced
- Concentration: the more concentrated then preferentially discharged
- The nature of the electrode: ?
What is electroplating?
- to coat one metal with a thin layer of another metal
- used to purify impurity
Realtionship of the electrode voltage and spontaniety
Positive E give negative G= spontaneous
What is the electron flow pattern in a half cell?
From more negative to more positive
PPOO
Positive potentials oxidize others
What are dactors affecting the electrolyte?
Current
Charge of ion
Relative mass of metal
Oxidation
Loss of electrons
- oxi number increase in products
