Beer’s Law Calibration Curve
Laboratory Determination of equlibrium constant?
Laboratory Details: http://64.233.167.104/search?q=cache:-zirT0LbqUYJ:services.juniata.edu/ScienceInMotion/chem/labs/ap/equilib.doc+determination+of+a+equilibrium+constant&hl=en&ct = Clnk & cd = 2 & gl = us. 1. I think I have a hard time with my data acquisition (absorbance) for the concentrations for the graph of a Beer's law. or I have the concentations ya? (No calculations required.) If I have these concentrations and then what are they? 2. What is a calibration curve and how I can complete one? 3. And I am confused with the initial and final concentrations, because even I do not know if I have the original. How I can find the end? My question almost everything resonates around the idea: "What **** am I doing wrong?" and "How I can fix it." Sorry for my choice of words, but I am ashamed of my incompetence and lack of understanding, please help! feel free to send an email with more information and questions
1. You must already have concentrations, as they have been unable to regain the same level. Somewhere in your lab notebook should have a data table concentrations in a column and the corresponding absorbances in another column. If you forgot to write the concentrations below, you will have to repeat this part of the experiment. 2. The calibration curve is an xy plot of the rules of the concentrations in the shaft and the absorbance in the x-axis. Plot the data (if you can find the data table) and make sure that is linear. If so, do a linear regression for the relationship between absorbance and concentration. 3. Once again, must return to his lab notebook, this time looking at his notes of the second part of the experiment. You have scored initial concentrations, and that mix these yourself (if you forgot to write, you will to repeat this part of the experiment). For the final concentrations, use the absorbance of Fe (NO3) 3 and KSCN mixtures and substitute them in the regression results linear calibration curve. I'm not sure if you are having problems because you forgot to record all data (in which case, sorry, no other way to return back and require the data) or because you are trying to do everything at once (in which case, just take a step by step then the next – you have the steps described in a good condition so I think it may be less confusing than you think).
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