2) Reference Electrodes
The E° value for the following reaction is 0.446 V relative to the standard hydrogen electrode (SHE):
Ag2CrO4(s) + 2e- –> 2Ag(s) + CrO42-(aq)A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a silver wire coated with Ag2CrO4 and suspended in a CrO42- solution.
a) What is the potential of this cell at 25°C when [CrO42-] = 1.00 M?
got this one 0.204 V
b) Calculate ΔG for the full-cell reaction at 25°C when [CrO42-] = 1.00 M?
got this one -3.94×101 kJ
c) What is the potential of this cell at 25°C when [CrO42-] = 9.90×10-9 M?
d) For a solution of unknown [CrO42-], the measured potential for the cell at 25°C is 0.327 V. What is [CrO42-] (in mol/L)?
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more