An investigator researched the effect of varying concentrations of glucose solution on the mass of sweet potato (Ipomoea batatas) cylinders.

The following procedure was used:

Cut 5 sweet potato cylinders of equal length and record the initial mass of each.
Immerse each cylinder in a separate boiling tube containing 40 cm³ of glucose solution of a different concentration (from 0.0 mol dm^-3 to 0.8 mol dm^-3).
Leave the cylinders for 3 hours, then remove them, carefully blot them dry with filter paper to remove excess surface liquid, and record their final mass.

The table below displays the results of the investigation:

Concentration of glucose solution ( $dm−3\text{mol dm}^{-3}$ )	Initial mass of cylinder ( $g\text{g}$ )	Final mass of cylinder ( $g\text{g}$ )
0.0 (distilled water)	3.20	3.68
0.2	3.50	3.71
0.4	3.40	3.40
0.6	3.60	3.24
0.8	3.00	2.55

Calculate the percentage change in mass of the sweet potato cylinder placed in the 0.6 mol dm^-3 glucose solution. Show your working.

Explain, in terms of water potential and osmosis, why the sweet potato cylinder in distilled water (0.0 mol dm^-3) gained mass, whereas the cylinder in 0.6 mol dm^-3 glucose solution lost mass.

An investigator researched the effect of varying concentrations of glucose solution on the mass of sweet potato (Ipomoea batatas) cylinders.

The following procedure was used:

Cut 5 sweet potato cylinders of equal length and record the initial mass of each.
Immerse each cylinder in a separate boiling tube containing 40 cm³ of glucose solution of a different concentration (from 0.0 mol dm^-3 to 0.8 mol dm^-3).
Leave the cylinders for 3 hours, then remove them, carefully blot them dry with filter paper to remove excess surface liquid, and record their final mass.

The table below displays the results of the investigation:

Concentration of glucose solution ( $dm−3\text{mol dm}^{-3}$ )	Initial mass of cylinder ( $g\text{g}$ )	Final mass of cylinder ( $g\text{g}$ )
0.0 (distilled water)	3.20	3.68
0.2	3.50	3.71
0.4	3.40	3.40
0.6	3.60	3.24
0.8	3.00	2.55

Calculate the percentage change in mass of the sweet potato cylinder placed in the 0.6 mol dm^-3 glucose solution. Show your working.

Explain, in terms of water potential and osmosis, why the sweet potato cylinder in distilled water (0.0 mol dm^-3) gained mass, whereas the cylinder in 0.6 mol dm^-3 glucose solution lost mass.

1.3 Transport in cells

Question 7

Markscheme

1.3 Transport in cells

Question 7

Markscheme

1.3 Transport in cells

Question 7

1.3 Transport in cells Questions

1.3 Transport in cells

Question 7

1.3 Transport in cells Questions