Diffusion Demo
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- Опубліковано 26 жов 2011
- Mr. Andersen talks you through the diffusion demo. After you finish watching this video you should be able to rank the following from smallest to largest: starch, glucose, water, IKI and the pores in the dialysis tubing.
who here is watching because the teacher told to watch it
my teacher is a bitch
mine did and this video is useless
@@minsin56 bro wtf you talking about? I literally did a whole lab report for this experiment from just this video...
@@rockyliseno8653 i cant understand it
My teacher is making me watch this video of some guy watching a video
So, im not gonna tell the answer, u figure that out! ok! what if I'm dumb?
If anyone has this for class today because of Covid Lmk Lol
I do
Who's here cuz of AP Bio?
lol me
ME LMAO
why else would we be here?
@@drploofenshmirtz2908 freshmen bio lmao
yall learning this in high school 🧍♂️?
Small and large generally denotes size
I believe it is
Water
IKI
Glucose
Pores
Starch
Everything but starch went through the pores, glucose cannot cross a some membranes that water can, IKI is composed of more massive atoms than water (although probably very nearly the same size)
Thank you so much I thought I was gonna figure it out myself 😉
my teacher gradeing this cause of covid it better be right
your a legend even 7 years later
@@livybearful Let me guess Stan State? lol
Thanks for this
lets be honest you didn't search this. your teacher made you watch it and answer the question
naur
yeah so what is the answer
Thanks a lot for making this, you really saved me. My class did this experiment like 4 months ago and I didn't do the lab report. I was doing it today but I didn't have ANY of the data - so you really saved me. THANK YOU :)))))))
Water
IKI
Glucose
Pores in dialysis tubing
Starch
thanks so much bro
same
I just have to say you made it so clear to understand!
thank you for posting this verrry helpful!
Thanks for great explanation.
The experiment shows that water, IKI, and glucose are smaller than the pores and starch is larger than the pores. Water is more basic that the other molecules so would be smaller. Glucose is a monosaccharide so would be smaller than the polysaccharide starch. But there is nothing in the experiment that would tell us if IKI is larger or smaller than Glucose.
AP level folks know glucose is C6H12O6 (24 atoms) and Lugol's is tri-atomic (IKI) so Glucose is bigger but not heavier... But: agreed: not revealed by lab exercise.
weird. my biology teacher did the opposite of this experiment, he kept the IKI solution in the tubing, and the starch/glucose solution in the beaker. This video was still helpful though, thankyou
Thank you for your vid
Super brilliant teacher
I will rank them depending on what I have understood:
1)water
2)IKI
3)glucose
4)pores in dialysis tubing
5) starch
You made this comment when I was 6 years old and I am using it now
I came to the same conclusion. But since I did, that means we’re both wrong.
So what were each of the components in terms of hypotonic, hypertonic, and isotonic? And they changed throughout the experiment, right?
thanx alot really helpfull
Mr. Anderson always has a way of explaining things so that I can understand them. Forest Gump reference intended ;-)
Matrix reference inadvertent.
Never seen the Matrix.
So what does iodine and starch do for that change. I have an assignment and those two play a part in what we would see if they crossed the membrane or what we would see if they didn’t cross the membrane
1. Which molecules are moving and in which direction?
2. Which molecules are NOT moving?
3. How does this demonstration mimic the cell membrane?
1. The iodine molecules moved INTO the tube, hence the solution inside turning blue due to starch plus iodine. The glucose molecules moved OUT of the tube, hence the positive testing for glucose in the outside solution
2. Starch did not move because it is too large of a molecule to move through the dialysis tubing
3. It mimics it in the aspect of it being semi-permeable, meaning not everything can move through it.
Kindly help provide an answer to this question please.
Name a molecule that diffused through the artificial membrane (dialysis tubing)that was used in the diffusion virtual lab. Can diffusion occur without a membrane? Give example to support your answer. Thanks
what does he mean by smallest to largest... smallest to largest what? color difference weight mass density? I am confused should have specified
This hitta Mr. Andersen is that hitta tho he helped me.
I kid I kid
quite helpful
how you can figure out the relative size of molecules ?
How did iodine help us determine if starch was able to exit of the cell?
bc when the iodine and starch meet it turns it blue. The starch didnt exit the bag bc only the bag turned blue, not the water in the beaker. Therefore it shows the starch is bigger than the holes in the bag bc it could only stay inside it not escape it. Oh wait....im 2 yrs too late lol.
How do we create a table with the results in this video?
@musicloverhere32 smallest to largest: water, glucose, IKI or iodine, membrane pores, starch
Thanks so much for answering this question, even nine years later this is really helpful. Idk if you're gonna see this but if you do, have a nice day
So dialysis tubing allows things in but not out?
Why did the bag turn a different color? Also, did anything other than glucose, in the bag, spread into the water/IKI?
it turned blue because of the presence of starch which diffused into the bag
@@mahrhaider5 starch was already in the bag so wdym? What diffused into the bag? Do you mean the IKI diffused in the bag, and if it did was it also on the outside of the bag?
It turned a different color due to iodine diffusing into the bag which mixed with starch and therefore the color changed.
IKI, water, glucose, dialysis tubing pores, then starch?
size i believe, diffusion is affected by temperature, ph, and size... so im going to say size..
Old youtube holy cow
Did any IKI make it into the bag?
Yes, thats why the bag turned blue.
only watched cause science teacher made me......slept through 4:51 to end
You sound like a genius....
Lol that's like the most important part lmao
pores in dialysis tubing.. how pores can diffuse?
pores = doorways. If you can't fit through door you can't diffuse out(leave) or diffuse in (enter). soulute & solvent diffuse. pores are the gateways
IKL
Water
Glucose
Pores
Starch
What a good show . You look so cute.
This is video Inception.
Where does the blue colour come from ??? What is the significance of this colour ?
IKI, particularly I (for "iodine") turns blue when it encounters starch. I diffused into bag (therefore blue) but no starch could escape bag (too big to fit) so outside remained amber (non-starch color) ;)
Smallest to largest molecule size is what he means.
smallest molecules to largest molecules, the smaller molecules will go through a permeable membrane
Essentially you don't. Everything that can pass through the pores is smaller than the pores and everything that can't is bigger. So you basically end up with three sizes.
You can still size them. As he said, you use logic and other knowledge :)
a video within the video.
Videoception!
Ah. Well in that case :)
Water
III
Glucose
Pores in dialysis
Starch
?
Oh. I miss understood the question. I put what is ever made up of if using those ingredients greater than lesser. If there was more starch would that cause to much statick?
*pog*
_
Let me guess...you’re here because your teacher made you. Or, even better, you’re here because you’re a big brain 🧠 in AP Biology.
lmao just your a 9th grader doesn't mean you have to flex, just watch the video and turn it in before 6th period