(ii) How would you extend the
experiment to get a more accurate
estimate of the cell sap
concentration?
Answers
Answer:
we can in 100 hrtz.!!!!!!!!!
Prepare a range of sucrose (a sugar) solutions. The concentration of a solution is measured in moles per cubic decimetre written as mol dm−3. For example, in this experiment your range could be from 0.2 mol dm−3 to 1.0 mol dm−3.
A 1.0 mol dm−3 solution of sucrose will contain up to 342 g of sucrose per dm−3. A 1.0 mol dm−3 solution of a substance contains one mole of the substance per dm3 of a solution, or one mole per litre of solution.
Set up a series of boiling tubes with each of these solutions. Also, set up one containing distilled water. This will have a concentration of sucrose of 0.0 mol dm−3 and will act as the control in the experiment.
Make sure each tube is labelled with the concentration.
Carry out the investigation as shown below. Prepare a blank results table before you begin. Make sure when weighing the potato cylinders, that their masses are not mixed up when recording them. Each cylinder will have a different mass before and after the investigation.
For each sucrose concentration, repeat the investigation for several potato cylinders. This allows you to make the experiment more repeatable – different potato cylinders might not behave in the same way. Making a series of repeat experiments means that any anomalous results can be identified and ignored when a mean is calculated.