Sketch the key components of a ph combination electrode and very briefly describe in your own words how it works and how does one use it to determine the ph of a solution. (4) give the reaction that relates the cell potential to the ph of a solution. do you expect an increase in the ph of a solution to result in an increase or decrease in the measured cell potential. (5) sketch the curve that describes the relationship of the cell potential to the ph of a solution in potentiometric measurement. label your axes correctly for credit. (6) sketch the titration curve of a polyprotic acid with a strong base and identify on your graph regions/values such as the buffer regions, pka values, volumes at equivalence point..etc.