Question 27
Earl filled a visking tubing, which is partially-permeable, with 50% of starch
and 50% of water. She was told that the starch molecules were too large to
pass through the visking tubing. The tubing was not fully filled at the
beginning of the experiment. She then tied a knot at the opening with a cotton
thread and attached it to the side of the beaker before immersing it into a
beaker of water.
After a day, she observed that the visking tubing was firm and fully filled. She
concluded that water entered the visking tubing.
Which one of the following correctly shows the percentage of the starch and
water content in the visking tubing after 1 day?
Percentage of starch in the
visking tubing after 1 day
Percentage of water in the
visking tubing after 1 day
A.
50 %
50 %
B.
Less than 50 %
More than 50 %
C.
More than 50 %
Less than 50 %
D.
50 %
More than 50 %
and 50% of water. She was told that the starch molecules were too large to
pass through the visking tubing. The tubing was not fully filled at the
beginning of the experiment. She then tied a knot at the opening with a cotton
thread and attached it to the side of the beaker before immersing it into a
beaker of water.
After a day, she observed that the visking tubing was firm and fully filled. She
concluded that water entered the visking tubing.
Which one of the following correctly shows the percentage of the starch and
water content in the visking tubing after 1 day?
Percentage of starch in the
visking tubing after 1 day
Percentage of water in the
visking tubing after 1 day
A.
50 %
50 %
B.
Less than 50 %
More than 50 %
C.
More than 50 %
Less than 50 %
D.
50 %
More than 50 %