In our chem lab, we were testing for an unknown equilibrium "k" value using the absorbency...

In our chem lab, we were testing for an unknown equilibrium "k" value using the absorbency rates of various concentrations, how am i supposed to find the k value if none of our samples ever reached equilibrium. Our prof said to calculate the absorbency of each sample, but all the values are obviously different.

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MY PERSONAL EXPERIENCE

Even my results do not seem very accurate. Even during the experiment, my partner and I agreed that our absorbance readings did not seem right. The readings jumped a significant amount between the first and second readings and the fourth and fifth readings. After the seventh reading, the absorbance readings seemed to be evening out, as the difference between readings was getting smaller. When reading some of the absorbances, we took a second reading because a few times the absorbance reading was smaller than the previous. This did not seem right; the absorbance readings should have been going up each reading. Error may be attributed to the fact that a few drops of solution escaped the 250 mL beaker during transfers between the cuvette. Error could have also resulted from the beakers not being totally clean, or the pipetment of solutions could have been inaccurate. This would have caused the volumes and concentrations to be different than they actually were.

queen_honey_blossom answered 1 year ago

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