I would add something about vacuum filtration. Either use gravity filtration or a very weak vacuum if your desired product has delicate crystals. Example: making metallic aerogel blocks

I love you Dave! You have been an indescribably amazing help in my journey to become a biochemist or potentially biologist. I love science in ever form, and it all excites me, and I'm not entirely sure what I want to progress to and your tutorials on nearly all fields help me gain a grasp on all of them. It's all so awesome but I have to make a decision soon because I return to college soon. Also how is everyone not just blown away by the existence of the natural world and the fact that we know so much (and simultaneous next to nothing) about it.

Wow. TF sponsorship! You really made it! I am very happy that you are being sponsored by the big manufacturers, which is a direct acknowledgement of your work.

Even thought chemistry isnt my favorite science, you make it interesting. I would love for every teacher to be like you!

animated videos are really so good

Your channel is amazing, you have a video on everything I need 🙏

I would imagine a funnel with a longer end protruding past the vacuum intake would prevent the vacuum from sucking up the filtrate. Seems like an important step.

Is there a specific lab kit that we can use to follow and perform along with the videos?

So far I've only performed vacuum filtrations using a faucet, and in these cases we're always taught to, when we're done, first pull the hose out, and close the faucet only after that. Otherwise, some liquid might flow back to the flask due to the change in pressure. I'm not sure that's also the case with the device being shown here.

This is actually a topic I learned about the other day, perfect timing for this video. I don’t know why but I’m always seeing vids about topics after I learn them. Just yesterday I learned about the MPLA from school, got on KZfaq and seen a video about Bo2’s MPLA mission

Thanks Professor Dave! Could you speak various types of spectroscopy such as IR UV vis and spectrometry such as MS NMR ICP?

Thanks, Dave! I'd not done vacuum filtration at school.

Thank you professor

These were incredibly helpful for the National Chemistry Olympiad.

It was really very nice

Filtração simples usada para separar misturas heterogêneas sólido+líquido usa a força gravitacional para remover as impurezas, queremos isolar (obter) o líquido filtrado passo a passo: dobramos o papel de filtro (podendo dubrá-lo em 1/4 ou 1/8, sendo o 1/8 uma técnica maia rápida) colocamos a argola no suporte universal e nela colocamos o filtro. Dentro do vidro, colocamos o papel de filtro, o qual molhamos com o mesmo líquido solvente da mistura para que ele adira ao vidro, sem deixar pontos secos ou bolhas garantimos que a mistura está "bem misturada" e despejamos ela lentamente no filtro notas: não tenha pressa! a mistura não pode passar da altura do papel de filtro, pois pode contaminar o líquido filtrado deixe o funil próximo do frasco coletor e com sua ponta tocando as paredes internas do recipiente (para que o líquido filtrado não goteje) para garantir que toda mistura foi separada, lavamos o recipiente em que estava a mistura com o solvente dela, para extrair os restos de soluto Filtração à Vácuo destinada para grandes volumes de mistura, por ser mais rápida obtenção do sólido (e também do liquido, mas o sólido é o principal) usamos um kitassato conectado à uma bomba à vácuo, pois a pressão causada pela remoção do ar puxa o líquido através do filtro, acelerando o processo usamos também um funil de buchner, o qual cobrimos com um papel de filtro (que deve ter exatamente o tamanho do funil, sem sobrar nem deixar de cobrir os buraquinhos) aperte o funil contra o kitassato para garantir a pressão adequada para que o papel adira ao funil, molhe-o com o solvente da mistura teste o funcionamento do sistema despeje sua mistura no filtro deixe a bomba ligada por um tempinho para "secar" o sólido obtido remova o papel de filtro com uma pinça notas: não deixe o vácuo muito intenso, isso pode rasgar o papel de filtro e resultar em contaminação não faça com que o líquido no kitassato atinja a parte em que o frasco é conectado com a bomba, ou o líquido será sugado pela máquina

Thanks professor ❤

Could you do a video on soxhlet apparatus extracting

could you please tell me the mixture that you tried in filtering in this video? the one in the vacuum filtration experiment part

Hi, Dave. This will be a fun series. Just curious though, what compound is your friend separating?

Thank you Why use a Buchner instead of a sintered sand core funnel with a thick porous filter?

Gravity AND Vacuum mentioned in the same video? Oh boy. Flerfs aren't going to like this. 🤣😝

This guy knows a lot about the science stuff

shoutout to the dude that demonstrates the experiments

Hello, Dave. Just an FYI, there's a channel that is impersonating you. Has your exact same profile picture and is reposting some of your videos but trying to make you out to be incorrect.

Not buoyancy and density filtration? How about energy of the heavens filtration?

yep, been there, done that, gone big. IOW, i've worked with all kinds of filters, from laboratory scale as shown in the video to industrial filter presses, several meters long with dozens of big frames that are pressed together hydraulically.

Lol the solvents coming out of the pump

Don't suppose you would ever do a video on Ketamine? It has been a life saving treatment for me, would be nice to know more about it.

How do people wash the flask to ensure it’s totally clean for next use? It would be quite contaminated if we can’t wash it and reuse it

Thanks

thanks

I know it's not really your thing but I'd love to see you do a video on climate change

They literally engineered the hemp doctor for me as street psychiatry! That's hilarious!

NICE !!!

Are there going to be any more Discovery institute videos?

I love your videos. Especially when you take on your flat Earthers. What you do is important. Thanks. 😊

"Gravity is just a theory!"

Everywhere in my lab, I see "fisher" (the is not an endorsement)

What is that machine called?

Sometimes a gravity filtration can be done using a cotton plug

professor michael morbius explains

The science of coffee 👩‍🔬 ☕️ 😎 excellent

People do good science every morning when they make coffee and don't even realize it.

The hemp doctor made me poop so good!

Gud video

Really a missed opportunity to have chemistry youtubers do these demos. Probably not as professional looking though.

Sir i am from india have done something called systumm hiladiye

At 3:12 "This maximizes the surface tension of the filter" Really? I would have guessed it would be surface area of the filter that would be maximized with this folding technique, making the liquid go through much faster.

Speaking of coffee ... I'll be right back!

Hahaha just did this in my lab on Thursday we were getting 9-fluorenol from 9-fluorenone

Dave. Unrelated comment, but could I please discuss something with you, on a call?

Thats just like all the tutorials you get when by searching But without all the annoying speaking pauses that makes you wanna have the video on 1,25 speed

5th 🎉

👍

Ok nerds

me 2nd

Anyone from CHEM 235?

Fuck yeah bitch les go

A few days after a friendly argument with my sister on this very topic🤌🏾