CHEM 11200 Chapter 5: Chem112.2014.HW5.soln
23 Jun 2016
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Chemistry 11200 solutions to problem set 5 (100 pts: problem 2f on the midterm. The solutions to the prior parts are posted to chalk. Part 2f says: in part c) we added a solution of na+(aq) and f-(aq) to an hf solution at. Fri. feb. 7, 2014 equilibrium and a reaction occurred, changing the ph. Support your answer by calculating g for the reaction written above, showing how you are using the instantaneous concentrations after the solutions are well mixed but before any additional reaction happens. Answer: you know that the naf solution is really na+(aq) + f (aq), so by le chatelier"s principle you would expect the reaction to head spontaneously in reverse when the solutions are mixed. But you have also double the volume of the solution (by mixing two 100 ml solutions together), which halves all the concentrations.
