GCSE Chemistry Revision "Introducing Electrolysis"

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In this video, we start looking at electrolysis. We explore why molten or aqueous ionic compounds can conduct electricity and then look at the reactions that take place at the cathode and at the anode.
This video is based on the AQA spec. If you are following a different exam board then you should check your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.

[@larayes4022]

What to remember: PANIC- Positive anode negative is cathode REDCAT- REDuction CAThode ANOX-Anode OXidisation OILRIG:- Oxidation Is Loss Reduction Is Gain LIPGIN- Loss Is Positive Gain is Negative your welcome

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legend

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I use An oil rig cat: Anode Oxiditation is loss reduction is gain cathode

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if only i had u as my teacher................

[@cgsrsyrdytd1679]

Why do they gain electrons when going to a negative thing

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i hate chemistry

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Fr

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it depends on how determined you are. You may revise for days on end, but if you don't want to actually revise, you will end up learning less than if you wanted to revise. Basically: an hour revising content you love is worth more than a day of revising content that you do not want to revise

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Me

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Me

[@ShirinRose]

I'm watching this on 1.5x speed to see if it's suitable (it is) to show to a student who I'm tutoring tomorrow

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All my boys know OILRIG

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nothing hits like 12am revision before exam

[@adamlone3271]

all those with doubts bout oxidation and reduction.... remeber OIL-RIG. oxidation is loss (of electrons) reduction is gain (of electrons). Hope I helped :)

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you explain electrolysis clearer than textbooks:)

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Ive only just started revising for my chemistry paper 2 and its tomorrow morning!!

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How did it go?

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WHEN I READ THIS CHAPTER IT SCARED THE SHIT OUTOF ME! BUT WHEN HE SAID IT IS NOT S TRICKY I KNEW I COULD BELIVE HIM :D..... AND HIS SMILE JUST CHEERS ME SO MUCH

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It is in my opinion harder than biology and physics

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ive learnt more in less than an hour of watching you compared to 6 months in my new school

[@Freesciencelessons]

Thanks for the comment. I'm glad that the videos are helping you.

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Thanks! This helped me get a grade 8 in my end of topic test for electrolysis. I was a mark off a 9!

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@@nomdeplume1358 still stuck on this topic

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have my mock tomorrow and haven’t started revising until just now…

[@jinethweragama1218]

Why is Pb in group 4 if it has a 2+ charge whne becoming an ion?Shouldnt it gain 4 or lose and therefore have a 4+/4- charge?Or is group 4 just weird?

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pov: no one replied 💀

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Let's be honest, you aren't watching the video, your just scrolling through the comments

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Monkey D Luffy we both in year 11 now gl lets hope we pass also how am i doing electrolysis now u did it last year ur lucky

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few days left

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[@JamesLee-cj9ik]

hi, sir, I have got a question: 1:08 that equation at the bottom do I have to memorize it, or is there any logical way to work it out? also if I wrote Pb2+ + 2e- = Pb will it still be correct? thx :)

[@Freesciencelessons]

I would memorise it. The equation that you have written is correct for reduction.

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Big up my guy Shaun for saving our Chemistry grades

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[@Celeste_51]

I’m confused why is Pb a 2+ ion if it’s in group 4? (Sorry can any one help me) edit: is it because it reacts with 2 bromines, and they each need to gain 1 electron as they’re group 7, so taking 2 electrons from Pb leaves it with 2 extra protons, meaning 2+ charge?

[@Freesciencelessons]

Yes that's essentially the answer. Lead is a complicated element to work out the charge for and is beyond GCSE level.

[@Celeste_51]

@@Freesciencelessons oh ok thank you, so you would just be given the ion?

[@Freesciencelessons]

Yes that's correct.

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ANION sounds like ONION which make u cry so it’s - so the CATION must be + ANION goes to ANODE CATION goes to CATHODE

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If you want to remember, OILRIG- oxidation is loss reduction is gain

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Thank you so much for taking the time to make these videos!!! I finally understand electrolysis now!!!!

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as a pupil of 2020, i guess i wont need to know this anymore. but thank you for all the videos shaun. even though we didnt do exams you still have a place in our hearts.

[@ismailfarooq.]

In case you forget about which electrode is red or ox Just remember CAR Cathode at Reduction and the opposite is obvious, Anode at oxidation. Hopefully this helps you :)

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Ty

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By the end of this video my eyes will be full of water

[@thanusanbalakumar9101]

how Pb^2+ when it has 82 electrons ????

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Me.

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1 hour before my gcse

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Everything you need will be given or can be worked out from the question.

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