The diagram below represents an operating voltaic cell at 298 K and 1.0 atmosphere in a laboratory investigation. The reaction occurring in the cell is represented by the balanced ionic equation below.
64 Identify the anode in this cell. [1]
HIGHLIGHT TO SEE THE ANSWER
NOTE= The anode is element that is higher on Table J. Also, electrodes are solids. NO IONS!!! Ni(s) or the nickel electrode Note: Do not allow credit for Ni2+(aq). |
65 Determine the total number of moles of Ni2+(aq) ions produced when 4.0 moles of Ag+(aq) ions completely react in this cell. [1]
HIGHLIGHT TO SEE THE ANSWER
NOTE=look at the balanced reaction for the mole ratio for the two ions (4.0mols Ag+ / 2Ag+)= x mol/ 1Ni2+ answer =2.0 moles |
66 Write a balanced half-reaction equation for the reduction that occurs in this cell. [1]
HIGHLIGHT TO SEE THE ANSWER
Reduction=Charge goes down electrons on the more positive side Ag + + e- ==>Ag2Ag+ + 2e - ==>2Ag |