Question

Below is a simple set of weights obtained while immersing potato slices in various sugаr solutions over 60 minutes.

Time OM sucrose 0.4M sucrose 0.6M sucrose (min) 0.8 M sucrose 1.0M sucrose
(min)
0 4.36 g 4.59 g 4.7g 4.5 g 5.0 g
30 4.5 g 4.3 g 4.4 g 4.1 g 4.6 g
60 4.68 4.28 4.0 g 3.7 g 4.08
For each solution, calculate the rate of weight change over this 60-minute period.
Using the osmosis data in the question above, determine the percent weight change for each sucrose solution.
0.0M sucrose = %
0.4M sucrose = %
0.6M sucrose = %
0.8M sucrose = %
1.0M sucrose = %

Answer 1

Step-by-step explanation:

The rate of weight change can be determined by using the formula:

weight change = weight at the final time - weight at the initial time.

Molarity Weight change

0.0M sucrose → (4.68 - 4.36) = 0.32 g/min

0.4 M sucrose → (4.28 - 4.59) = - 0.31 g/min

0.6 M sucrose → (4.0 - 4.7) = - 0.7 g/min

0.8 M sucrose → (3.7 - 4.5) = - 0.8 g/min

1.0 M sucrose → (4.08 - 5.0) = - 0.92 g/min

Percent weight change =
`\frac{\text{final weight - Initial weight}}{Initial \ weight } *100`

Now;

Molarity Weight change

0.0M sucrose →
`(0.32)/(4.68)* 100` = 6.8 %

0.4 M sucrose →
`(0.31)/(4.59) * 100` = 8.4 %

0.6 M sucrose →
`(0.70)/(4.7) * 100` = 14.8 %

0.8 M sucrose →
`(0.80)/(4.5)* 100` = 17 %

1.0 M sucrose →
`(0.92)/(5)* 100` = 18.4%