Question

#15

0 3.5 4.0
0.2 3.5 + 0.5
0.4 3.5 3.7 + 0.2
0.6 3.5 3.4 - 0.1
0.8 3.5 2.9 - 0.6
1 3.5 2.2 - 1.3
1.8 - 1.7
which two conclusions can be correctly drawn from this data?
oa in the 0.4 mol/dm³ solution, the sucrose molecules moved across the semi - permeable membrane to go from a lower solute concentration (the potato) to a higher solute concentration (the sucrose solution), leading to a decrease in the weight of the potato.
ob in the 1 mol/dm³ solution, the water molecules moved across a semi - permeable membrane to go from a lower solute concentration (the potato) to a higher solute concentration(the sucrose solution), leading to a decrease in weight of the potato.
oc in the 0.8 mol/dm³ solution, the sucrose molecules moved across a semi - permeable membrane to go from a lower solute concentration (the potato) to a higher solute concentration(the sucrose solution), leading to a decrease in weight of the potato.
od in the 0.2 mol/dm³ solution, the water molecules moved across a semi - permeable membrane to go from a higher solute concentration (the sucrose solution) to a lower solute concentration(the potato), leading to an increase in weight of the potato.
oe in the 0.6 mol/dm³ solution, the water molecules moved across a semi - permeable membrane to go from a lower solute concentration (the potato) to a higher solute concentration(the sucrose solution), leading to a decrease in weight of the potato.

Explanation:

Osmosis is the movement of water molecules across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration. When the solute concentration outside (sucrose solution) is higher than inside the potato, water moves out of the potato, decreasing its weight. When the solute concentration outside is lower, water moves into the potato, increasing its weight. Sucrose molecules do not move across the semi - permeable membrane in this context.
For option B, in the 1 mol/dm³ solution, the sucrose solution has a higher solute concentration than the potato, so water moves out of the potato, decreasing its weight. For option E, in the 0.6 mol/dm³ solution, the sucrose solution has a higher solute concentration than the potato, so water moves out of the potato, decreasing its weight.

Answer:

B. In the 1 mol/dm³ solution, the water molecules moved across a semi - permeable membrane to go from a lower solute concentration (the potato) to a higher solute concentration(the sucrose solution), leading to a decrease in weight of the potato.
E. In the 0.6 mol/dm³ solution, the water molecules moved across a semi - permeable membrane to go from a lower solute concentration (the potato) to a higher solute concentration(the sucrose solution), leading to a decrease in weight of the potato.