Osmosis Practical & revision

Question 1

1)

Answer 1

Firstly get a cork borer and take a sample of the potato with all the same diameter (three samples)

Question 2

2)

Answer 2

Cut the end of the potato is impermeable.(skin)

Question 3

3)

Answer 3

Measure the potato into 3 cm length (cut if long)

Question 4

4)

Answer 4

Measure them again accurately recorded on your result table

Question 5

5)

Answer 5

Weigh The potatoes and record on your result table

Question 6

6)

Answer 6

Put the chip into the boiling tube

Question 7

7)

Answer 7

Get down eye level with the measuring cylinder and put 10 mL of distilled water and put it in the tube with the chip.

Question 8

8)

Answer 8

Label what is inside the tube and put a bund to the tube to prevent evaporation out of the tube

Question 9

9)

Answer 9

Then for the remaining two tubes add 0.25 mL of sucrose for 1 tube and the other put 0.5ml of sucrose and leave for 24 hrs

Question 10

10)

Answer 10

Get the distilled water tube then pour out the potato chip (use a sieve) and remove the exes liquid (paper towel).

Question 11

11)

Answer 11

Measure the potato chips and weigh it again I’m recording results Taiwan do the same for the tubes

Question 12

12)

Answer 12

Then calculate the difference of mass from the length before and after. (Take lent you got today and minus the enitial length)

Question 13

Diffusion

Answer 13

Diffusion is the net passive movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration.

Question 14

Osmosis

Answer 14

Where only water moves across a partially permeable membrane from a dilute solution to a concentrated solution.

Question 15

Prokaryotes

Answer 15

Prokaryotes are tiny and they sometimes have a cell wall but not made of cellulose also DNA is “free “in the cytoplasm not in the nucleus

Question 16

Eukaryotes

Answer 16

Eukaryotes can be multi cellular and they evolved from prokaryotes