Lab Exercise 3B To be completed before beginning week two of the Osmosis and the

Question

Lab Exercise 3B To be completed before beginning week two of the Osmosis and the Scientific Method Lab. 1. The following data were collected during a study of the effect of potassium chloride (KCI) solute concentrations on osmosis in a potato core over a period of 60 minutes. Table 1: Mass (grams) of potato cores in different concentrations of KCI 0% KCI 1 % KCI 4% KCI 0 Minutes 6.2 6.5 6.3 20 Minutes 6.3 6.6 6.1 40 Minutes 6.5 6.6 5.8 60 Minutes 6.7 6.8 5.6 Use the data in Table 1 and the formula for percent change in mass to complete Table 2 below. The first two calculations have been done for you as examples. a. Table 2: Cumulative percent change in mass of potato cores in different concentrations of KCI 20 Minutes 0 Minutes 40 Minutes 60 Minutes 0% KCI 1% KCI 490 KCI Cumulative % change Mass (current time point)- Mass (time point zero) Mass (time point zero) X 100 For 0% KCI at 0 min: b2-6.2 X 100 = 0% For 0% KCl at 20 min: 63-62 x 100= 1.6% 6.2 6.2 For 0% KCl at 40 minutes: For 0% KCl at 60 minutes: Complete the calculations for 1% and 4% KCL

Explanation / Answer

Answer:

0 Minutes 20 Minutes 40 Minutes 60 Minutes 0% KCL 0 1.6 4.8 8 1% KCL 0 1.5 1.5 4.6 4% KCL 0 -3.2 -7.9 -11

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