Questions For Beer's Law Lab And Colorimeter Unknown Determination

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1) In this lab, what process did you use to generate the different known samples?

2) If you did not use the LabQuest 2 (that gave you a direct concentration reading from the observed absorbance), how would you determine an unknown concentration from an observed absorbance? Explain your process.

3) Actually do the process you stated above for one of the two unknown concentration. (Of course will need your graph and all information about your graph (it should be downloaded from LabQuest 2 / Graphic Analyzer ).

4) In this lab, if you made a mistake and thought the concentration of the initial known sample (one you used to make all the other known standard samples) was half as much as it should have been, what would happen to the slope of absorbance vs. concentration line. It is assumed there are no other mistakes and all other steps in the experiment were completed perfectly.

5a) What do you call "it" when you determine a value of a slope of a line that is in between two points that were used to generate the line? What assumption are you making when you are doing this?

5b) You determine the equation (slope y-intercept) of a line from known data (a range of values). What do you call "it" when you determine a value from using that line equation IF the unknown value lies outside the range of the equation (i.e a value greater/lower than range of values), what is that process called? What is assumption you are making when you do this?

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Last edited October 9, 2019 4:44 am (diff)