CHEM 1050 Lecture Notes - Lecture 21: Nernst Equation, Sodium Chloride, Overvoltage

• School: University of Guelph
• Department: Chemistry
• Course: CHEM 1050
• Professor: Mario Monteiro

Document Summary

Please remember that at 298 kelvin, 2. 30rt/ = 0. 0591 if the temperature is different, you cannot just use this therefore e = e - (0. 0591/n)log(q) Do not include solids in the q equation! Homework: (aq) zn+2 + cu(s) recall: zn - cu+2 galvanic/voltaic cell. We saw that we obtain 1. 10 v under standard state [1 molar each] What is the emf of this cell when [cu+2] = 5. 0 m, and [zn+2] = 0. 050 m is the emf now greater or lesser than 1. 10 volts? you can think in terms of q: Q = 0. 050 m / 5. 0 m. We have way more reactants than products reactants increase the amount of products produced. E = 1. 10 - (0. 0591 / 2) log(0. 050 / 5. 0) E = 1. 10 - (0. 0591 / 2)(-2) E = ? if it is the opposite, then the [products] become greater than [reactants], the emf goes decreases until the battery dies.