Electrolysis | 9-1 GCSE and IGCSE Chemistry | OCR, AQA, Edexcel, CIE, WJEC

[@Poppy-pf2nr]

Thank you Hazel. I left school at 14 with no GCSEs, as I just struggled to understand from the group teaching methods which caused me to lose all motivation. I’m now learning around my job and hope to take my GCSEs next year - I feel so positive! Your videos and explanations are so easy to follow and I’m really enjoying learning now - thank you so much!

[@SciencewithHazel]

Thank you for such a kind message. I’m so happy that my channel is helping, and I wish you the best of luck for when you sit your exams!

[@Idklol10102]

Howd your exam go

[@damsh._mary]

How was the exams?

[@lejammiedodgere]

I know this was made a year ago, but boy is this useful. Funnily enough, I heard some Year 11s at school watching one of your videos on Physics and I thought, hmm that sounds useful. I have a Chemistry Electrolysis assessment tomorrow, and this REALLY helped (I'm in Year 10 btw). Thanks

[@sameyarahman5565]

Dman 6 years ago

[@lejammiedodgere]

@@sameyarahman5565 Dang, man, I had completely forgotten about this comment. Time flies, I turned 21 last month and finished my second year of university. Yet here I was 6 years ago revising for GCSE Chemistry, haha. Thanks for the blast from the past, man, I wish you the very best.

[@Brian-fj2cu]

ISTG my year 11 teacher has been tryna teach me for 1 month and a 16 minute video helped me

[@ridwanali6013]

i have a test tomorrow and hazel saves the day

[@daisytallulah7297]

Thank you so much! My friend recommended this channel, and it has helped me so much !

[@hollyskye8487]

your welcome ;) X

[@ro2589]

Thank you so much for this! I have one question though - at 11:37 why does it say sodium is produced at the negative electrode? Because isn't sodium more reactive than hydrogen, so hydrogen gas will be produced at the negative electrode, not sodium ? edit: I think it's because the question is talking about a molten ionic compound, not an aqueous solution?

[@saisriram262]

they're are some equations which say concentraed,aqueous,dilute or concentrated aqeous i know what they mean but does it change the products of the electrolysis,if so how

[@kushia4002]

hey hazel i find them tricky but i like it, do u think a level chemos would be okay or is it a bit of a step up?

[@SciencewithHazel]

It is a big step up from GCSE, and brings in a lot more maths. If you enjoy the subject though and are willing to work hard then I say go for it!

[@kushia4002]

@@SciencewithHazel k thanks! juts so undecided i don't wanna make the wrong decision

[@bernicetan6979]

HI Hazel! AT 8:32, the equation is wrong! I think it should be 4OH^- > 2H2O + O2 + 4e^-

[@abrajrashid9856]

Hi hazel can you please explain me how did you get those equations at 5:24 and 5:25

[@sydneymwaba7542]

Please do a video on how to write ionic equations

[@ilovemyguineapigs1]

just came across your videos and they are so so so helpful, thank you so much!x

[@chocolate8818]

Thank you Hazel you are such a gem

[@az71003]

in the last equation why is H2O aqueous? 18:13

[@zeyadessam4173]

wwewieywieywiyewieyieywieywieydddudiudidueidueiduiuedueiduiduede edueiduieudieduei iuedieudidu iduiedu diuiedue deidiedueid sry

[@jangs10]

Watching all your videos for tomorrow’s exam, so brilliant video 😘

[@leigh-annfranetzki2985]

hi hazel! just a quick question: how do you know which elements are diatomic? do we have to remember it or do we get it given to us??!!

[@SciencewithHazel]

You'll need to remember them. This is a good way: "Horses Need Oats For Clear Brown Is (eyes)" Horses - hydrogen Need - nitrogen Oats - oxygen For - fluorine Clear - chlorine Brown - bromine Is - Iodine :)

[@leigh-annfranetzki2985]

thank you so much Hazel!! you're an amazing teacher :))

[@alioptimist4013]

Another Great Video.Really helpfull for cambridge students.

[@leigh-annfranetzki2985]

could you explain the difference between the endings of elements such as sulphur, sulphide, sulphate or bromine, bromide etc. ?

[@SciencewithHazel]

- Sulphur, Bromine, Chlorine etc are just the names of the element. - ide is the ending given when an element forms a compound e.g. hydrogen sulphide (H2S) or sodium chloride (NaCl) - ate is the ending given when an element forms a compound AND there is also oxygen combined e.g. calcium sulphate (CaSO4) or sodium carbonate (Na2CO3)

[@leigh-annfranetzki2985]

+Science with Hazel thanks you so much!! I appreciate all your help it's so great how you take so much time and effort to make these videos!!! Super useful

[@SciencewithHazel]

It's my absolute pleasure - just so happy you're finding my channel useful! x

[@annabelmaciver2588]

Hiya just watched this video and it was so useful! just wondering how do you know if an element is negative or positive or it is just to do with which electrode it is at? also how do you know if its 2+ or + for example? thank you so much x

[@SciencewithHazel]

Metals always form positive ions as they have to lose electrons to have a full outer-shell. Non-metals form negative ions as they have to gain electrons to have a full outer-shell. Check out my video on bonding if you're unsure of what I just wrote (kzbin.info/www/bejne/r4G7haWViauGlbs). For the metal, the charge number corresponds to its group number (transition metals differ), for non-metals the charge number is 8 minus the group number.

[@gulshanbibi5102]

Please can you make video regarding igcse advance information for exam 2022

[@yuyafujikawa1729]

At 9:26, isn't choice b wrong as well? since at the anode, Br2, which is a molecule(not an element) is formed..? Am I wrong? Thank you so much for the video!

[@mwills8692]

It forms Br which immediately covalently bonds with another Br to form Br2 so sort of

[@sathira2259]

theres a part where i don't get, why would oxygen form???

[@isaureechivard7831]

Hey, do you give online tutoring lessons?

[@mizyclifton2624]

Is this all that's needed to be known for the AQA Additional course too?

[@_kessarkana_]

I have an exam in a few minutes ... Tysm

[@Adsy125]

What happens if there are two halide ions at the anode?

[@adeenajavid8535]

Yeaaa

[@qwerty-9778]

How do you know if the metal is more or less reactive than hydrogen in edexcel? thanks

[@SciencewithHazel]

+jake jaki annoyingly you have to learn the reactivity series off by heart, including the positions of carbon and hydrogen

[@seendeedsbd2929]

thanks for this video.

[@АидаРозыева]

thank you !!Hazel ))))

[@tombradshaw9383]

A negative ion - anion

[@abdulazeem1928]

Perfect for BMAT preparation :)

[@amirasalah5642]

Your vids are so helpful, thanks alottt

[@orlaithmaguire5585]

How did you know it was hydrogen and hydroxide please anyone I have a gcse tomorrow

[@SciencewithHazel]

Orlaith Maguire aqueous means it contains hydrogen ions and hydroxide ions

[@orlamagee8812]

Orlaith Maguire hello

[@orlaithmaguire5585]

Science with Hazel thank you so much !!

[@orlamagee8812]

Science with Hazel what is aqueous

[@SciencewithHazel]

+Orla Magee dissolved in water

[@tinnytan9042]

thanks so much was predicted a b for chemsitry but in my mocks got a star 92 percent

[@SciencewithHazel]

+Tinny Tan oh my goodness that's incredible! Well done you! X

[@tinnytan9042]

Science with Hazel could you do a video on metals and metal carbonates and also crude oils and alkenes and polymerz

[@SciencewithHazel]

+Tinny Tan I've already made videos on this topics

[@jemma_palma]

Thank you so much! This helped me a lot xx

[@SciencewithHazel]

+dearjem yay! X

[@hamzarahman5038]

this is very good

[@serenity7637]

Was this hazel's emo era

[@naimr334]

thanks a lot.

[@calvinmckenzie4751]

YAY, NOW I FINALLY UNDERSTAND ELECTROLYSIS, NINE HOURS BEFORE MY EXAM. XD

[@zeyadessam4173]

how much did you score i hope u scored a nine

[@zerminashakoorabdulshakoor1416]

Are you providing notes somewhere?... if u you are it would be great if you'd help with that

[@SciencewithHazel]

+Zermina Shakoor Abdul Shakoor I have pdfs available for IGCSE edexcel and AQA for £3. Email me [e-mail] if you want to get hold of a copy

[@zerminashakoorabdulshakoor1416]

Science with Hazel okay...

[@adeebavlogs7842]

Can you make a video on half equations?

[@SciencewithHazel]

+Adeeba Hussain this video has them! 5:32

[@NewtonAshish]

Please make a video on electrodes ( active and inert)

[@alioptimist4013]

You put a lot of energy in your videos.I always think you will fell down as lesson gets over..

[@gtrrohit5078]

ty!

[@angelstarfire]

10:24 a reminder for me

[@cheesenglam3816]

perfect

[@DraxPC]

cheers.

[@SebiniAudio]

Who was calling you?

[@TickleFN]

Who is phoning me?

[@orlaithmaguire5585]

Please xoxo

[@g0bi.03]

Thank you Hazel. I left school at 14 with no GCSEs, as I just struggled to understand from the group teaching methods which caused me to lose all motivation. I’m now learning around my job and hope to take my GCSEs next year - I feel so positive! Your videos and explanations are so easy to follow and I’m really enjoying learning now - thank you so much!

[@SciencewithHazel]

Thank you so much for such a lovely message. I wish you the very best of luck in your exams next year. You can do it!

[@g0bi.03]

Not next year mam I'm doing edexcel igcse on this November 😊

[@roseanne9020]

@@g0bi.03 Edexcel or Cambridge