Question

Carry out the following osmosis experiment:
Take four peeled potato halves and scoos each one out to
make potato cups. One of these potato cups should be made
from a boiled potato. Put each potato cup in a trough
containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups
and answer the following:
(i) Explain why water gathers in the hollowed portion of
B and C.
(ii) Why is potato A necessary for this experiment?
(iii) Explain why water does not gather in the hollowed out
portions of A and D.
...d for aromth and renai
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Answer 1

sorry for my handwriting ,I done this as fast as I could

Answer 2

$\huge\star{\green{\underline{\underline{\tt{Explanation:}}}}}$

______________________________

• $\huge{\red{\star}}$ (i) Water accumulates in the hollowed portions of B and C as a difference in the water concentration is observed.
• $\leadsto$Thereby, endosmosis occurs as the cells act as a semipermeable membrane.

• $\huge{\red{\star}}$ (ii) Potato A is essential in this experiment as it is significant to compare different scenarios seen in potato cups B, C and D.
• $\leadsto$The potato A in this experiment clearly shows that the potato cavity on its own cannot bring about water movement.

• $\huge{\red{\star}}$ (iii) Cup in A does not show any change in the water flow concentration for osmosis to occur, which requires the concentration to be higher than the other.
• $\leadsto$Cells in cup D are dead, thus there is no existence of a semipermeable membrane for water flow. Consequently, osmosis does not occur.