Very informative and useful even 3 years after being uploaded. Thanks!

Even though it seems fine to include the mass of the weighing boat for all the tubers, when calculating % change in mass, the denominator of the fraction will include the mass of the weighing boat as well instead of it just being the mass of the tuber, hence giving us a slightly inaccurate % change in mass. As you might say, the mass of the weighing boat might be negligible, but it would make a notable difference when dealing with such small masses. Anyway, thanks for a great video :)

Brilliant thank you!!! Just did this practical but found this so helpful as our teacher wasn't allowed to explain much!!!

Thanks a lot! This video was really helpful and nicely produced.

Your videos are outstanding. You must continue these. !

@biologypracticalsandrevisi8066

4 жыл бұрын

Cambridge IGCSE and As/A-Level Science Thanj you. When I have time I will make more. They are unrehearsed one takes and they are far from perfect but I am glad they are useful.

Detailed and informative, thanks a lot.

This is so useful! Thanks so much!

This Video is really really useful . Thank you very much for your effort Madam

This video is really helpful.. thank you...

looks like it was recorded on a Facebook portal with the weird camera panning

Hiya, thank you so much for the helpful video! What would you suggest to write for the lab report risk assessment?

Hi! Really love these videos, very helpful. May I know why a sucrose concentration is the most ideal as opposed to other non-electrolytes like mannitol?

Thanks for detailed information...

Thank You!

I can't thank you enough🙏🙏

Brilliant

Amazing

Thankuuuuuuuuuuu , you helped me literally 😘😘😘😘

This table and gas taps and even knives look exactly the same as the ones in my school!

Is the volum of 1.0m sucrose fixed? Can i use other volume to make 0.2m concentration other than using the volume of 4ml?

thank you miss

how did you make the 1 mol sol

thanks a lot!!!!!!!

where could i find an equipment list for this practical?

Can u tell me why a rhoeo leaf isn't use for the water potential practical ?

Thanks

How did you Work out the Numbers in the table at the beginning???

@Syiepherze

7 жыл бұрын

Cam S I think it's like this: Total volume of liquid in each tube is 20 cm^3. • 0M = 0 cm^3 sucrose/20 cm^3 • 0.2M = 4 cm^3 sucrose/20 cm^3 • 0.4 = 8/20 • 0.6 = 12/20 etc etc And if you're using 10 cm^3 total then it's much more straightforward (e.g. 0.2M is literally 2 cm^3 sucrose out of 10 cm^3 total liquid) And so on. Idk how you work out the individual volumes, but I'm pretty sure it has something to do with the sucrose:water volume ratios. Sorry if my reply is too late (I'm only cramming practical-related stuff now for paper 3 :/ )

6:16 misstated a percentage mass change as a mass gram change. Great video.

What would the conclusion be of the whole experiment?

@ICCDZ

4 жыл бұрын

When you get the isotonic water potential for a cell or a tissue in a solution, it would mean the external water potential is the same as the internal water potential. You get the water potential for a specific plant tissue, in this case a potato.

what could you substitute the potato chips for?

can you do this experiment with salt dissolved in water instead of sucrose solution?

If you were to draw a line of best fit, would the line be straight or would it connect to all points?

@mayamistry7203

3 жыл бұрын

connect the points so itll be like a curve

What would be a hypothesis for this experiment ?

@biologypracticalsandrevisi8066

7 жыл бұрын

It isn't really the type of investigation that requires an hypothesis. You are simply finding the water potential of plant tissue. Hypothesis are testable predictions based on evidence from prior research or observations. It wouldn't be correct to randomly predict the water potential of plant tissue then test it to see if you were correct. So no hypothesis I'm afraid.

I’m in ur 10 and I’m dying rn. This is my hwk:)

@emilys3198

11 ай бұрын

u graduated now while im still im in year 10

@muffin._.milk.

11 ай бұрын

@@emilys3198 ah that's shitty, jokes on yr10 me, I went back to science, and now have to do this again

Thank youu

Tnx

could you explain how you got the serial dilutions. the calculations

@niacherryblossom

6 жыл бұрын

C1 v1= c2 v2 this is c1 is the original concentration v1 is the 20ml = c2 is the different concentrations used and v2 is the volume needed to make it up to the 20 ml mark....late reply hope it helps

@sukh6566

6 жыл бұрын

Amount of sucrose solution= Total volume (20cm3)/Concentration Volume of distilled water= Total volume (20)-Volume of sucrose

puse at 4:06 for results tabel layout

😍

How to make the dilution series?

@onigirifluff

6 жыл бұрын

simple dilution with the formula required concentration divided concentration of given solution multiplied by the total volume of your solution you may also use serial dilution

people.. can someone tell me which is independent and dependent variables? and control? ASAP!!

@biologypracticalsandrevisi8066

6 жыл бұрын

Ethan Fate independent is what you change. In this case the different concentrations of sucrose. The dependent variable is the result you measure and record. In this case the change in mass. There is no control in this investigation.

@ethanfate5439

6 жыл бұрын

GOT IT!! THANKS!!! 🙏 😭.

@arhamijaz4573

2 жыл бұрын

Controls would be the size of chips and the volume of sucrose

This video is great but needlessly complicated. 1ml = 1 cubic centimetre, so measurements can be done in ml instead of cubic centimetres. Also 1 decimetre is = 1000 cubic centimetres which one is 1 litre or 1000 millilitres. Why measure in decimetres cubed, does your graduated cylinder measure that way? Use 342.3 grams of sucrose per litre of water to make the sucrose solution.

@biologypracticalsandrevisi8066

3 жыл бұрын

It is simply the confusion that many measuring cylinders and syringes are labelled ml. Some students are confused that a ml is the same as a cm3. The videos are unrehearsed one takes. Nothing fancy but I hope a little bit helpful.

dont u need a water bath?

siapa yang kesini gara-gara tugas fisiologi tumbuhan

Why do the potato chips need to be blotted dry?

@umar757

7 жыл бұрын

because each potato tube has a different amount of water on its surface, so when you're weighing their masses you're only taking into account the mass of water gained or lost and not any water which might be present on its surface,.

You have nice nails.

@HaroldMoose

Жыл бұрын

Thanks! You too!

halo ges

CAN THIS EXPERIMENT BE CONDUCTED OVER THE COURSE OF SEVERAL WEEKS RATHER THAN 20 MINS?????

whats distilled water ?

@jungshook9927

7 жыл бұрын

It's pure water and has a water potential value of 0

@King-sm8ns

7 жыл бұрын

Water that has been omitted of any ion. It is pure. For example, regular tap water has sodium and magnesium ions, but distilled water is pure H2O

@jungshook9927

7 жыл бұрын

I have my experiment tomorrow. My board is Aqa. Anyone else?

@King-sm8ns

7 жыл бұрын

Jungshook I have mine on Monday :D AQA as well!

@jungshook9927

7 жыл бұрын

King42415 good luck!! ☺️☺️

gar mo daddy lkey

Who the fuck is the camera man

Thanks