- Видео 362
- Просмотров 1 555 613
Nigel Baldwin
Добавлен 16 май 2013
High school chemistry
Aspirin hydrolysis
High School Chemistry
A level Chemistry practical to produce an organic solid and purify it.
One required practical on the A level Chemistry syllabus that is widely used is the production of aspirin by the reaction of 2-hydroxybenzoic acid with ethanoic anhydride.
But, what to do if ethanoic anhydride is banned in your location?
One possibility is to do a hydrolysis of aspirin, essentially the reverse of the above mentioned reaction.
In this video clip 6 aspirin tablets and 100ml of sodium hydroxide, 0.4M are used. The reaction was stirred overnight at room temperature, around 26 C.
The next day the reaction mixture was acidified using 25ml of hydrochloric acid, 2M. The product of the reaction ...
A level Chemistry practical to produce an organic solid and purify it.
One required practical on the A level Chemistry syllabus that is widely used is the production of aspirin by the reaction of 2-hydroxybenzoic acid with ethanoic anhydride.
But, what to do if ethanoic anhydride is banned in your location?
One possibility is to do a hydrolysis of aspirin, essentially the reverse of the above mentioned reaction.
In this video clip 6 aspirin tablets and 100ml of sodium hydroxide, 0.4M are used. The reaction was stirred overnight at room temperature, around 26 C.
The next day the reaction mixture was acidified using 25ml of hydrochloric acid, 2M. The product of the reaction ...
Просмотров: 1 555
Видео
Iron oxide, aluminium and magnesium
Просмотров 1,2 тыс.Год назад
High School Chemistry Wear safety spectacles and carry out behind safety screen Background video clip A small scale reaction between iron oxide, aluminium powder and magnesium ribbon. See details in the video clip UWFI7062
Testing for an alkene IMG 2225
Просмотров 92Год назад
High School Chemistry Safety This experiment should be done in a fume cupboard The bromine water test is on our IGCSE Chemistry specification as a required practical. And yet the procurement of bromine water can be problematic. A quick substitute for bromine water on a small scale can be improvised using household bleach, 2M hydrochloric acid and potassium bromide solution. Lot's of interesting...
IGCSE Chemistry quiz - identify three gases
Просмотров 166Год назад
High School Chemistry IGCSE Chemistry Identify the three colourless gases in the video clip from their test results Please note that I didn't get any of the chemicals on my hands whilst making the video clip. Thanks to Dr Gavan Cooke for filming this one
Magnesium plus sulphuric acid NPGF8193
Просмотров 1,1 тыс.Год назад
High School Chemistry IGCSE Chemistry Making a salt Method 1 acid metal = salt hydrogen An excess of magnesium metal is added to a small volume of sulfuric acid in a beaker. Magnesium reacts with sulfuric acid Q1 What gas is produced? Q2 What salt is produced? The reaction can be monitored by observing the bubbles of colourless gas produced. However, magnesium also reacts slowly with water prod...
Limewater and carbon dioxide tests on two scales IMG 1978
Просмотров 115Год назад
High School Chemistry IGCSE Chemistry Testing for carbon dioxide gas using limewater Traditional apparatus using a delivery tube and smaller scale apparatus using a cut off bulb from a plastic dropping pipette The cut off plastic dropping pipette bulbs are easy to wash out and re-use.
Iron III thiocyanate art DGHG7361
Просмотров 3942 года назад
High School Chemistry Safety Wear safety spectacles, lab coat and gloves Fun with iron III thiocyanate the dark red one that is sometimes called fake blood After chatzida 8 minutes of joy with Chemistry experiments experiment number 3 The Bleeding Heart ruclips.net/video/NOiHE_9a2Mc/видео.html Thank you Professor Chatzidakis requirements 3% hydrogen peroxide, 250ml in a beaker approx. 1.5g pota...
Factors affecting the rate of a chemical reaction WNOD4382
Просмотров 2722 года назад
High School Chemistry Safety DO NOT USE 50% hydrogen peroxide, it decomposes very violently and exothermically when mixed with manganese dioxide. 50% hydrogen peroxide should be diluted at least 10X to 5% or less for use in experiments. Wear safety spectacles, gloves and a lab coat Factors affecting the rate of a chemical reaction Topic primer or revision video What are the four factors that le...
Heating iodine
Просмотров 6 тыс.2 года назад
High School Chemistry Heating iodine Safety Heating iodine should always be carried out in a fume cupboard. It turns into purple iodine gas very easily and this should not be breathed in. The violet vapour is harmful. It attacks the eyes, skin and lungs. Iodine is also very toxic to aquatic life. Experiment What happens when you heat solid iodine in an evaporating basin using a Bunsen burner? D...
Heating sulphur
Просмотров 4 тыс.2 года назад
High School Chemistry Heating sulfur or sulphur Safety Heating sulfur should always be carried out in a fume cupboard.It burns very easily with a pale blue flame producing toxic sulfur dioxide.Sulfur dioxide is a toxic gas which should not be breathed in. Experiment What happens when you heat solid sulfur in a crucible using a Bunsen burner? Does it melt? Does it have a low melting point or a h...
Separating salt and sand
Просмотров 12 тыс.2 года назад
High School Chemistry How would you separate a mixture of salt and sand? What techniques would you use? Key Stage 3 resource video For homework or those studying at home
Titration of HCl against NaOH using methyl orange indicator MYFI9765
Просмотров 18 тыс.2 года назад
Titration of HCl against NaOH using methyl orange indicator MYFI9765
Testing three blue solutions and other unknowns NTRG2511
Просмотров 1672 года назад
Testing three blue solutions and other unknowns NTRG2511
Magnesium and iron sulfate solution IMG 0760
Просмотров 3,4 тыс.2 года назад
Magnesium and iron sulfate solution IMG 0760
GCSE Chemistry Testing three unknown substances DXDE9049
Просмотров 3812 года назад
GCSE Chemistry Testing three unknown substances DXDE9049
Limewater test for carbon dioxide No sound IMG 0423
Просмотров 1132 года назад
Limewater test for carbon dioxide No sound IMG 0423
Testing carbon dioxide with limewater IMG 0422
Просмотров 9652 года назад
Testing carbon dioxide with limewater IMG 0422
Reactions of acids and using Universal Indicator at school PXL 20220121
Просмотров 6982 года назад
Reactions of acids and using Universal Indicator at school PXL 20220121
The reactions of lithium, sodium and potassium with water PXL 20220119
Просмотров 1,2 тыс.2 года назад
The reactions of lithium, sodium and potassium with water PXL 20220119
Bicarbonate rockets in slow motion 2 C0133
Просмотров 1273 года назад
Bicarbonate rockets in slow motion 2 C0133
Bicarb rocket - Testing the bung is water tight PXL 20210815
Просмотров 523 года назад
Bicarb rocket - Testing the bung is water tight PXL 20210815
Preparing a bicarb rocket at home PXL 20210815
Просмотров 513 года назад
Preparing a bicarb rocket at home PXL 20210815
Heating a mixture of copper (II) oxide and carbon C0118
Просмотров 3,2 тыс.3 года назад
Heating a mixture of copper (II) oxide and carbon C0118
Recrystallisation of copper sulfate C0068
Просмотров 9053 года назад
Recrystallisation of copper sulfate C0068
Sodium chloride crystals from cooking salt and sea salt DSCN1087
Просмотров 5383 года назад
Sodium chloride crystals from cooking salt and sea salt DSCN1087
first comment lets go in eight years
top
Nikle
XD el ruido jajajaja fua
GLOVES? You're handling 6M H2SO4 goddamnit, gives me the willies
If you're sloppy, H2S04 is a problem but if you take normal care, it should be ok. I'm from a generation where we never used gloves in the lab and we survived.
This is a useless video
Is he making a fookin bomb?
Numerical simulation of the phenomenon: @.
Amazing
Worst video i have ever seen till date.
so... can you explain the science behind why one catalyst is better than the other?
love this video,it's simplified and understandable
Why he plug the flask of the acid?
Hi! We are the students of Jeonnam Science High School in Korea! We have a lot of interest in Chemisty and these days we are conducting a study on bz reaction. We tried to make it in our laboratory, but we have failed all the time. There were so many ways to make it, and we couldn't ensure about them. By chance, we could see the video that you uploaded in RUclips and wanted to ask you HOW DID YOU MAKE THAT REACTION, concentric circles made a beautiful pattern. We found all the materials used, but we're not sure about how much of them are used. a99309508@gmail.com This is my e-mail and I hope you to have an enough time to give a respond to our message! Have a nice day! lol
Great video! I was looking for different catalysts to use in my experiment. Btw, did you measure the temperature in each cylinder, to see if there was a noticeable difference?
Very useful!
Awesome man, keep it up!! This video helped me a lot!