2. In part A of the experiment copper will be used by every student and is most

Question

2. In part A of the experiment copper will be used by every student and is most easily treated as the cathode when observing cell voltage. What reaction is occurring at this cathode? The reaction at this cathode will depend upon the species present at the anode Cu(s) Cu2-(aq) + 2e O Cu2-(aq) + 2e Cu(s) O Copper is inert and there is no reaction at the cathode 3. In part A of the experiment a student measured a cell voltage of 2.05 V. The cathode used was copper, Ered = 0.34 V, the same as in this lab. What is the Eored of the anode of this cell? 4. If the multimeter in the previous question is hooked up backwards, what istheE red of the non-copper electrode in this cell? 5. In Part B of the lab you will be performing electrolysis. What will happen to the masses of the electrodes at the anode and cathode? Anode Cathode 6. A student is preparing to complete part B of the experiment. From the information provided in the lab manual determine how long (in seconds) it would take for 0.455 g of Cu to be transferred with a current of 45.2 mA and how many moles of electrons would be transferred Faraday's Constant = 96485 C, 1 amp = 1 C/s Moles of electron Time of transfer: 7. How should waste in this lab be disposed of according to your lab instructions? Metal solutions should be put in the inorganic waste beaker and any solid metal pieces should be thrown in the trash O Metal solutions can go down the sink and any solid metal should be cleaned and returned to the o Metal solutions should be put in the inorganic waste beaker and any solid metal should be cleaned O Metal solutions can go down the sink and any solid metal pieces should be thrown in the trash front and returned to the front

Explanation / Answer

Ans 2 : Cu2+(aq) +2e- ---> Cu (s)

Cathode is a negatively charged electrode . Positively charged ions (cations) migrate towards it and accept electrons to get reduced to neutral atoms. This will cause the electrode to become thick.

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