A student cut several tubes of potato tissue, all similar in length. She weighed them all and recorded the mass. She placed each tube of potato tissue in a dish containing a sodium chloride (salt) solution. She used three different tubes of potato in each salt solution. The potato tubes were left in the dish overnight. After this, the potato tubes were removed from the dishes and weighed again. The table shows the results the student obtained. Sodium Mass at Mass at end/g % change in Mean % chloride start/g change in mass solution/M mass 1.93 1.42 -26.42 1.00 1.88 1.31 -30.32 -26.51 2.02 1.56 -22.77 1.98 1.42 -28.28 0.75 2.09 1.46 -30.14 -30.25 2.01 1.36 -32.14 2.02 1.38 -31.68 0.50 2.00 1.47 -26.50 -28.56 2.00 1.45 -27.50 2.01 1.98 -1.49 0.25 1.98 1.86 -6.06 -3.02 2.01 1.98 -1.49 2.04 2.48 |21.57 0.00 1.98 2.46 24.24 +18.47 1.98 2.17 9.60 a) Plot a graph to show the mean % change in mass of potato in different salt solutions. b) Suggest and explain how you could use your graph to estimate the salt solution with the same water potential as the potato tissue. c) Use water potential terminology to explain why the potato tubes placed in 1.00M salt solution lost mass. d) The student calculated the percentage change in mass, rather than the loss in mass in g. Explain why.
A student cut several tubes of potato tissue, all similar in length. She weighed them all and recorded the mass. She placed each tube of potato tissue in a dish containing a sodium chloride (salt) solution. She used three different tubes of potato in each salt solution. The potato tubes were left in the dish overnight. After this, the potato tubes were removed from the dishes and weighed again. The table shows the results the student obtained. Sodium Mass at Mass at end/g % change in Mean % chloride start/g change in mass solution/M mass 1.93 1.42 -26.42 1.00 1.88 1.31 -30.32 -26.51 2.02 1.56 -22.77 1.98 1.42 -28.28 0.75 2.09 1.46 -30.14 -30.25 2.01 1.36 -32.14 2.02 1.38 -31.68 0.50 2.00 1.47 -26.50 -28.56 2.00 1.45 -27.50 2.01 1.98 -1.49 0.25 1.98 1.86 -6.06 -3.02 2.01 1.98 -1.49 2.04 2.48 |21.57 0.00 1.98 2.46 24.24 +18.47 1.98 2.17 9.60 a) Plot a graph to show the mean % change in mass of potato in different salt solutions. b) Suggest and explain how you could use your graph to estimate the salt solution with the same water potential as the potato tissue. c) Use water potential terminology to explain why the potato tubes placed in 1.00M salt solution lost mass. d) The student calculated the percentage change in mass, rather than the loss in mass in g. Explain why.
Basic Clinical Laboratory Techniques 6E
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Author:ESTRIDGE
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Chapter2: Basic Hematology
Section2.13: Erythrocyte Sedimentation Rate
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Transcribed Image Text:Question A8
A student cut several tubes of potato tissue, all
similar in length.
She weighed them all and recorded the mass.
She placed each tube of potato tissue in a dish
containing a sodium chloride (salt) solution.
She used three different tubes of potato in each
salt solution.
The potato tubes were left in the dish overnight.
After this, the potato tubes were removed from
the dishes and weighed again.
The table shows the results the student obtained.
Sodium
Mass at
Mass at end/g
% change in
Мean %
chloride
start/g
change in
mass
solution/M
mass
1.93
1.42
-26.42
1.00
1.88
1.31
-30.32
-26.51
2.02
1.56
-22.77
1.98
1.42
-28.28
0.75
2.09
1.46
-30.14
-30.25
2.01
1.36
-32.14
2.02
1.38
-31.68
0.50
2.00
1.47
-26.50
-28.56
2.00
1.45
-27.50
2.01
1.98
-1.49
0.25
1.98
1.86
-6.06
-3.02
2.01
1.98
-1.49
2.04
2.48
21.57
0.00
1.98
2.46
24.24
+18.47
1.98
2.17
9.60
a)
Plot a graph to show the mean % change in mass of
potato in different salt solutions.
b)
Suggest and explain how you could use your graph to
estimate the salt solution with the same water
potential as the potato tissue.
IF
c)
Use water potential terminology to explain why the
potato tubes placed in 1.0OM salt solution lost mass.
The student calculated the percentage change in
d)
mass, rather than the loss in mass in g. Explain why.
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