00:01
So according to the figure, you have figure five.
00:04
So figure five, we have iodine.
00:16
Then you'll have a figure six, which is a dialysis bag filled with 20 ml of starch.
00:32
Then figure seven, you put the dialysis bag into the iodine solution.
00:40
And then figure eight, after 20 minutes, you take the dialysis bag out.
00:46
So what we observe is that initially, the iodine, the beaker with iodine should be brownish color, yellow.
01:20
Then starch dialysis bag is going to be white.
01:30
So this is before you mix, you put the bag into the iodine.
01:35
Now, what is the final color? the beaker with iodine is still brown and yellowish color.
01:56
But this dialysis bag, the starch actually become black and blue.
02:03
So this will be the initial, the final and initial observation.
02:09
So the next question that which cross the membrane iodine or starch explain your result? so from there, we can conclude that it's the iodine actually cross the membrane, but the starch did not.
02:44
So let's take a look.
02:46
So what we know is that when starch meets iodine, it change color...