- #1
Da Apprentice
- 59
- 0
I ran an experiment in which a Daniell Cell (using Cu and Mg electrodes with Cu Nitrate and Mg Nitrate as the electrolytes (both 0.1mol)) was heated on both sides by using two beakers filled with water, the water that heated the cell was heated to about 92C and then left to cool. The experiment was run for about 2 days after which the Cu Nitrate (0.1mol) electrolyte decreased in volume by 30% (from 50ml-35ml). Some of the reasons I believe to have caused this are that the Cu Nitrate evaporated - but I'm not sure if this is a viable factor becasue aparenetly Cu Nitrate doesn't boil until at about 170C. *can the Cu nitrate be considered separate to the water it's mixed with? - Another factor i thought might influence the volume is the loss of the Cu nitrates ions to the Cu, but this wouldn't have such an effect as to decrease the volume by 30%, would it? I was wondering if anybody had any other possible explanations for this decrease in volume?
Thanks,
Edit: Also why is it that the Cu Layer on both the top and bottom of the bearker formed? Shouldn't it have completely bonded to the Cu metal? (image attached) Is this result common in Daniell Cell testing?
Edit 2: Sorry i found what the reason for the loss in mass was, the salt brige has absorbed some the Cu Nitrate, As for the Cu layer being formed I'm still unsure as to why this occured
Thanks,
Edit: Also why is it that the Cu Layer on both the top and bottom of the bearker formed? Shouldn't it have completely bonded to the Cu metal? (image attached) Is this result common in Daniell Cell testing?
Edit 2: Sorry i found what the reason for the loss in mass was, the salt brige has absorbed some the Cu Nitrate, As for the Cu layer being formed I'm still unsure as to why this occured
Attachments
Last edited: