I am doing my Chemistry Individual Investigation at the moment. I am investigation the rate of reaction between Peroxydisulphate ions and Iodide ions-- using iodine clock method(sodium thiosulphate-as rate determining step) and then colorimetry.
But, in the lab we have digital and analog colorimeters and i cannot decide which to use!
Digital - can be temperamental, but gives data to more decimal places and is more exact.
Analog - works easily, but is down to my human judgement and error and i cant record values to 3dp! also the dial is constantly moving so each 5 seconds i have to try and read the value in a second! and its mind numbing! especially when my reactions can go on for 30mins!
Does anyone have any suggestions on which to use? my teachers dont want to guide me!!!
OCR (Salters) Chemistry Investigation -- Colorimetry question watch
- Thread Starter
- 17-01-2010 13:07