metals dissolving

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Jasmine Botello 2F
Posts: 67
Joined: Fri Sep 29, 2017 7:04 am

metals dissolving

Postby Jasmine Botello 2F » Tue Feb 20, 2018 8:16 pm

How can you tell if a metal will dissolve in a solution?

Amanda Wu 2C
Posts: 31
Joined: Sat Jul 22, 2017 3:00 am

Re: metals dissolving

Postby Amanda Wu 2C » Tue Feb 20, 2018 9:45 pm

Lavelle went over an example of whether a metal dissolves (the gold ring in nitric acid example) in lecture. In looking at his example, I think he calculated the standard cell potential for the reaction occurring and then plugged that value into to the delta G naught = -nFE naught equation to find the standard gibbs free energy. In terms of determining whether the gold ring dissolved in the solution, he determined it based on the spontaneity, or lack thereof, of the reaction, as indicated by the sign of delta G. Because the sign of delta G naught is positive and therefore the reaction is not favorable, the gold ring won't dissolve.

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