PRACTICAL SKILLS - PAG 5 - PREPARATION OF ETHYL ETHANOATE (PURE ORGANIC LIQUID)
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- Опубликовано: 5 июл 2024
- In the video I carry out a preparation of ethyl ethanoate followed by purification via use of separating funnel and drying agent. Practical techniques used include :
Reflux
Use of separating funnel
Use of drying agent
Redistillation
I also discuss the significance of the boiling range of the final product and carry out a percentage yield calculation.
thank you so much for this! I did this in class but couldnt remember much
Brilliant that was really helpful.
Glad you think so!
Hi, after you add the drying agent, do you filter it before redistillation or do you redistill the mixture directly? Thanks
You would filter/decant before redistillation
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Hi Sir, what if the boiling point is lower than 77.1° C?
Omg sir do you have merch
hi sir i was wondering why you did the percentage yield using moles instead of mass and if its more of an accurate way?
Not more accurate just always done them that way
Because each of the compounds have different molar masses so it wouldn’t make sense to use the mass since it’s balanced in terms of mols
In your other video on PAG 5 you did the distillation first then put it into a seperating funnel. Why did you use a seperating funnel first and then distillation in this experiment? Does it matter which way?
Hi sir, can i know why you used the number of moles of alcohol to find yields percentage?
Just the way I do it.
Is there a specific name for the technique shown at 5:40 ?
It's called venting - definitely not required to know this term for A level Chem
Is it just me or anyone else noticed the walter white portrait next to the white board?
Hey Sir, i’m not sure if you’ll see this in time as my exam is tomorrow but at 9:53, why should you make sure the ester isnt fully boiled? Would you not want to collect all of the ester?
Just in case he doesn't reply my guess would be that with no liquid in the flask to absorb the heat energy the glass would risk smashing under the heat
Good luck tomorrow as well :)
@@jackdawson6888 ahhh right that makes sense. Cheers boss and you too👍🏽
Sorry been out all day. It’s because the flask heats up rapidly once empty. There’s a danger that the flask will be damaged or even worse, potential of 💥!!! Not required at A level btw
@@MaChemGuy cheers Sir. I appreciate all the help, I only found your channel about 2 weeks ago but even within 2 weeks your videos have been so beneficial. I can’t imagine how good at A level chemistry I would’ve been if I knew about your channel beforehand😂 I’m definitely going to recommend your channel to the year 12 chemists at my sixth form so hopefully they can benefit for longer.
is that heisinburg on the wall
No, it's Walter White.
no its batman