GCSE Chemistry AQA - Paper 1 *PREDICTIONS* (May 2024)

In this video, we will go through 3 predictions based on research of all the past papers for AQA GCSE Chemistry Paper 1...

[EternaXl]

Aluminium is used to explain why aluminium oxide (bauxite) cannot be separated to form product of aluminium through carbon reduction as aluminium is more reactive than carbon. Therefore alumium oxide should be separated through molten electrolysis by adding cryolite into the solution to decrease melting point making the system overall more energy efficient and cheaper as you would no longer require as high of a melting point to turn them molten in order to extract the aluminium metal.

[voodoocurry]

Can you please do a video on the chemistry hard quantitative questions in chemistry because it’s always the math questions that put me down

[confuzzled_child]

ngl i would say his predictions were pretty accurate

[abigailthebagel]

MY ANSWERS TO QUESTIONS HE DID
1) Reduction can't be done with carbon for aluminium as it's more reactive than carbon
2) Cryolite's added to aluminium oxide to lower the melting point from ~2000 degrees C to 900 degrees C, saving energy, money, and resources
3) Electrolysis doesn't have a 100% yield as:
* some products are in gaseous form (eg hydrogen) so it can escape the reaction.
* some aluminium may be lost during separating the mixture
* there may be side reactions occuring so different products are being formed that we dno't want/need
4) OH BOY HERE WE GO COMPARING DIAMOND AND GRAPHITE
* Diamond forms 4 strong covalent bonds, graphite only forms 3, both to other carbon atoms.
-> therefore diamond is a giant covalent structure and graphite is a giant covalent lattice
-> this means diamond is an incredibly strong and hard material, used in things like cutting tools and jewelry. Graphite's layers of lattice structure is held by weak intermolecular forces, which makes it soft and easy to remove layers, so it's used in things like pencils. Because of graphite's layers and the fact it only forms 3 covalent bonds means that graphite has a sea of delocalised electrons, meaning it can move freely through the structure and conduct electricity. (ADDED IN WHILE WATCHING HIS ANSWER: However, diamond can't conduct electricity as it has no delocalised electrons. Diamond has a very high melting point as it requires a LOT of energy to overcome the incredibly strong covalent bonds, whereas graphite's melintg point isn't as high, due to the weak intermolecular forces between layers don't take much energy to overcome.)
5) TITRATION METHOD
* i wrote it on a flash card and cba to copy it out rn, got the exam in less than two hours now woo

thanks sir!

[hhertjjgdghjmd]

please do one for aqa combined trilogy!!!

[MdAhanafThamid-duui]

aluminium is above carbon in the reactivity series

[LilNoodles]

Please could you do Edexcel biology, chemistry Triple Higher

[Average_Life]

Sr can u do a video on some past papers for combined science higher coz I feel like I really understand your videos and I've been watching u since a few months now and ur the only one who bought me to a 77 . so can u pls do a past paper question video where u go through the exact mark scheme too!
thanks

[Maya-lynk]

is this for combined science: trilogy too?

[vintxge_taetae]

Hello! Can you pls clarify, in the last titration question, shouldn’t it be the other way around ie. Acid in the burette, and alkali in the flask?

[aadilmiah]

what required practicals do you think is going to come up

[john.smith]

Is it because aluminium is what the electrodes are made of?

[Marcuskkk]

I thought graphite has high melting point???