I’m assuming many people are gonna have to watch this in the future, this is greetings from the year 2021, hope however far in the future you are (even if it’s just minutes) is going well for you :)
I remember learning to do this in 3rd year chemistry. Now I’m in advanced higher where I actually had to use this because the lab technician in my school decided to give us a chemical we needed for an experiment as a dry powder instead of a solution.
At around 3:00 - 3:05, one can quite clearly see the double line in the neck of the flask, indicating that the viewer is not looking perfectly horizontally through the neck of the flask, and hence giving rise to parallax error. This should be avoided, and it should also be pointed out, as it gives rise to determinate error.
Write an experimental procedure (instructions) for preparing five calibration solutions. You should start with solid copper sulphate pentahydrate (molecular mass = 250 g mol-1) and prepare of a 100 mL aqueous stock solution of Cu2+ ions with a concentration of 0.1 mol dm-3. This stock should then be used to produce five calibration solutions with concentrations of 0.01, 0.02, 0.04, 0.06, 0.08 mol dm- 3. You should be specific about the glassware required and the masses and volumes used. Help me answer this question please
shouldnt the swirling/shaking of the volumetric flask be done after you rinsed it through the wall of the volumetric flask? And the turning the volumetric flask upside down should it be done?, wouldnt the solution touch the stopper and actually affect the final concentration...?
I'm here searching for the right solvent I would use to prepare a stock solution for my plant extract. I was looking for a solvent that would preserve the citral component of th plant extract that I will be using. But I can't still find it 😭
Assuming you have a desired concentration and volume. You find the moles of solute needed by multiplying the concentration (in mol/L) by the volume(in litres) then multiply the number of moles by the gram formula mass of the substance you are making a solution out of and that gives you the required mass.
I’m assuming many people are gonna have to watch this in the future, this is greetings from the year 2021, hope however far in the future you are (even if it’s just minutes) is going well for you :)
Hi, you from the previous year. You manipulator of time.
Your anime level future sight caught me.
no the queen died rip😩
Man said greetings
2022.
2023
I remember learning to do this in 3rd year chemistry. Now I’m in advanced higher where I actually had to use this because the lab technician in my school decided to give us a chemical we needed for an experiment as a dry powder instead of a solution.
At around 3:00 - 3:05, one can quite clearly see the double line in the neck of the flask, indicating that the viewer is not looking perfectly horizontally through the neck of the flask, and hence giving rise to parallax error. This should be avoided, and it should also be pointed out, as it gives rise to determinate error.
shut up nerd
ah shush man
Fuck up Ned
Claude Farrugia no one gives a shit
Write an experimental procedure (instructions) for preparing five calibration solutions. You should start with solid copper sulphate pentahydrate (molecular mass = 250 g mol-1) and prepare of a 100 mL aqueous stock solution of Cu2+ ions with a concentration of 0.1 mol dm-3. This stock should then be used to produce five calibration solutions with concentrations of 0.01, 0.02, 0.04, 0.06, 0.08 mol dm- 3. You should be specific about the glassware required and the masses and volumes used.
Help me answer this question please
2:52 describes my anxiety for tomorrow's chemistry test
My deadline submission is tomorrow and my anxiety is 100%
@@pubgiraqi6999 :O good luck
how'd the test go?
@@lilkae8864 honestly i don't remember but my recent one was bad
@@PuudingMusic damn man... collab?
Simple technique and a common source of titrimetric errors for students.
no lol
shouldnt the swirling/shaking of the volumetric flask be done after you rinsed it through the wall of the volumetric flask? And the turning the volumetric flask upside down should it be done?, wouldnt the solution touch the stopper and actually affect the final concentration...?
Sat here going over my applied science work....
are u doing triple?
me to loool
Thank you soooo much 🙏⬅️
What does that line mean? Why is it important?
10% NaOH means how much should I weight take for the standard solution?
Wow thank you💞
very very cool!
swagalicous
@@charliemorris296 it is indeed
life saver.
I'm here searching for the right solvent I would use to prepare a stock solution for my plant extract. I was looking for a solvent that would preserve the citral component of th plant extract that I will be using. But I can't still find it 😭
This was very helful
How much water did you add at the beginning and how the weight of sample
Water at the start shouldn’t affect the standard solution as it is measured at the end in the long neck flask.
How to calculate the mass you need????😭
Assuming you have a desired concentration and volume. You find the moles of solute needed by multiplying the concentration (in mol/L) by the volume(in litres)
then multiply the number of moles by the gram formula mass of the substance you are making a solution out of and that gives you the required mass.
@@cremebrulee2484 too late 😂
How to prepare IODINE 1ml equals to 0.001mg standard solution?
trying to find out how to make quercetin because it should be a cheap and effective Covid-19 Treatment...
u r genius
Thanks
تحضير المحاليل
لوسمحت ممكن توضيح لخطوة حساب الكتلة و التركيز إن أمكن؟
yo where it at
What a bogstandard bogus video.
Regards, Archibald
true man
@@yes9234 fax
Mam please iske age ke video s banayiye mam
நியமக் கரைசல்களை தயாரிக்கும் முறை...
Thanks!
Very cool thank you
Thanks very much
Bruh
Bruh
Bruh
Bruh
طلاب السادس الفصل السادس وينكم😂
3rB poseu els subtituls per saber les paraules jajaja
🤔🤔🤔🤭
its easy bro
دازيلكم ياه عالكلاس🙂😂
@@3sha_i 😂😂😂هاي العام من جنت مرحله اولى😂💙
@@shahadlaith00 وهسه اني مرحله اولى وداشوفه💔
@@3sha_i 💙💙ان شاء الله تطلعين منها💙وهيه زينه
Tory making Gak
any Lebanese University students?
a couple of big practical mistakes! so disappointed considering the video source!
What were the mistakes?
hi 2026