You have been asked to determine whether a handwritten will,…
You have been asked to determine whether a handwritten will, supposedly prepared 30 years ago, is authentic or a modern forgery. What aspects of the document would you examine to make this determination? Explain how you would use thin-layer chromatography to help you come to your conclusion.
Read DetailsThe black silver sulfide discoloration of silverware can be…
The black silver sulfide discoloration of silverware can be removed by heating the silver article in a sodium carbonate solution in an aluminum pan. a. Write down the two half-reactions for this cell. (4 marks)Anode:Cathode: b. What is the cell potential, E°{“version”:”1.1″,”math”:”E°”}? (2 marks) c. If the standard reduction potential for Al3+ is -1.66 V, calculate the reduction potential for the half-cell reaction (2 marks) Ag2S(s) + 2e- → 2Ag(s) + S2-(aq){“version”:”1.1″,”math”:”Ag2S(s) + 2e- → 2Ag(s) + S2-(aq)”} d. Why is a sodium carbonate solution needed? Would a sodium chloride solution work just as well? (2 marks)
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