CHEM FINAL

label the diagram:
-put in the arrows representing phase change

-put the arrows representing where unrelated ions will flow

- label the cathode and anode

-label the flow of the electrons

also, define what a cathode and anode is in the textbox

(a)  

Answer explanation

1 - positive charge will flow one direction, and the negative charge will always flow the opposite direction

2 - the ions to keep the charge the same are unrelated to the ones in the reaction

• 3 - what is being reduced goes from aq --> s (elctrode)
  what is being oxidized goes from s --> aq

4 - electrons flow from anode --> cathode

find the voltage by looking up the values on sheet:

how do you find it?

(a)  

Answer explanation

the voltage is the:
cathode - anode

spontaneity of redox half reactions can be judged by redox potential E°

positive values tend to occur (spontaneously/nonspontaneously

(a)  

what is the equation of the potential of the standard cell E°

(a)  

Answer explanation

the half reaction with the more positive reduction potential will be the reduction (cathode)

the more negative would be anode

using the previous equation, write the shorthand "conventional" notation

(a)  

Answer explanation

phase change = |

salt bridge = | |

1) write half reactions

2) identify anode and cathode

(the one with the higher potential = cathode, the lower one = anode which need to be flipped around)

3) write overall chemical reaction

4) identify the number of electrons associated with overall chemical equation

5) calculate the standard cell potential

6)write conventional notation of the cell

7) demonstrate the electron flow

write the reductions

find their voltages

identify the cathod/anode

flip the anode

write overall reaction

determine # of electrons

find the Ecell

draw the diagram

write the conventional diagram

(a)  

Answer explanation

reducing agents are on the _______ (reactant/product) side of the reaction with the best reducing agents being the most ________(positive/negative)

(a)  

to find the potential for the oxidation half reaction, reductions can be changed to oxidation by changing the

(a)  

what metal will dissolve in (react with) 1.0M HCl

(a)  

Answer explanation

for instance, Zn has a cell potential below zero!