AQA A-Level Chemistry - The Halogens (Gp. 7)

This video runs through the halogens section of the AQA spec. Note that it does not cover the trends in boiling point and electronegativity.
Due to the length of the video, the following markers can be used to take you to the named sections:
3:57 - displacement (oxidising power of the halogens)
13:43 - formation of bleach
16:26 - chlorine and water
20:22 - halides as reducing agents
23:23 - reactions with sulphuric acid
34:19 - testing for halides

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bro made this when I was in year 5 and 8 years later i'm here in year 13 using this MAD

[@user-uf1wg6sp4x]

LMAO, here I am year 12

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I was 7 when he made these and here i am doing my A levels 😂. Good luck to anyone doing them! 😊

[@faridahamad2493]

"I chose potassium because... I like the look of the K"

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Pretty valid tbf

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[@meganstevenson196]

I might have to apply the 'formation of bleach' to a use other than cleaning, if my exam this afternoon is as bad as the specimen papers.

[@marcuspreedy1389]

You're an absolute saviour man.. I find watching these so much more beneficial than reading the books! Thank you

[@MrERintoul]

Marcus Preedy Excellent!

[@joshteale8057]

"gcse on steroids", helpful vid thanks dude :)

[@benchwarmer108]

This bit is GCSE on STEROIDS. This guy is my hero

[@luttycorp]

PLUS H2S

[@faysalmohammed2821]

@@luttycorp 😂😂

[@bensonthomas197]

It's odd how I don't get this topic for a month, I spend hours reading through the text book and I still don't get it. I then come across this video and get it instantly! Thank-you!!

[@JohnJohn-sj2ge]

lovely mate :/

[@halftimelordwizard]

Your videos are so concise 👍 I can't imagine how your lesson must be like. Do you manage to do the entire AS course in one term haha

[@eri4232]

Our teacher did that and now I dont understand anything but this guy is amazing regradless

[@abz4life100]

not watched any of the videos yet , but just wanted to say that we appreciate you taking the time out to produce these videos , very grateful

[@MrERintoul]

Maybe you should watch them before thanking me... haha. Thank you for the kind words, though!

[@abz4life100]

E Rintoul currently watching them mate, good stuff learnt more in these 40 minutes than I have in the entire year in college.

[@MrERintoul]

abz4life100 Good work! And thank you for the comments, they are appreciated.

[@34naveed]

For those of u who wants to know the sulphur one then this is the equation 6HI + H2SO4 ----> 3I + 4H2O + S. Which is yellow solid

[@34naveed]

3I2 not 3I

[@user-or1tp5bo5q]

What are the 2 half equations for that?

[@hillaryantwi9279]

That’s not in the spec

[@user-rg2lp1hj4k]

@@hillaryantwi9279 thats cos 6 years agi was old spec. they updated it after 2016

[@arjunsonecha4806]

@@user-rg2lp1hj4k so this equation aint on the spec?

[@M3HAN]

Thanks so much! Actually understood this just need to keep repeating it to get it in my head! Its funny how my Chem Teachers needed 3-4 lessons to explain this and even then they rushed through it, I didn't understand barely any of it...But you explain it perfectly in 40 (which is 5 mins earlier than a single lesson in my school) making it easier to understand. Ty once again!

[@MrERintoul]

***** No problem!

[@feeltheshadow6959]

M3HAN_ Anytime!

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Honestly, i have no idea what i would do without your videos. You are Literally saving my a levels.

[@biancasoo328]

The'GCSE on steroids' tho.... Great video!!!! Helped me a lot since I have no idea what my lecturer is talking about.

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Suddenly KZbin is full of scientists rather than haters, thanks

[@feeltheshadow6959]

+Samantha Job No problem!

[@GILDGAMINGGILDGAMING207004]

Exams in two weeks, none of this topic stays in my head

[@iplay7816]

Your videos are helping me so much! Very compact and straight forward with key information required for exam, eliminating things we do not need to know which are included in the textbook! Thanks again!

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This video was sooooo helpful, I can't thank you enough for this, you are truly the best chemistry teacher ever

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The way you said cleaning at 14:38 just made my day, (thinking about all the poor unfortunate A level students who have never cleaned anything :') )

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@@mohameddalghous that’s Hailey bieber my g

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[@deltius]

great example of why this guy is a better teacher than my teachers: if my teachers had just called it formation of bleach i would've remembered it from the start

[@ismailumarji6177]

Very useful to watch the night before the exam to pick up some of the small details, thank you!

[@MrERintoul]

Ismail Umarji Absolutely! Make sure you are well-rested for tomorrow.

[@JuiceBoxBoiii]

This video is so great! I am writing my May/June series this year! This summaries quite well and I can take lecture through this! Thank you!!

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[@jessicaegharevba195]

Thank you so much I am in A2 and I have mocks in a few weeks, I have never really understand this topic in class until now. I always find your videos helpful I just use the text book for references. Thanks again

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[@MrERintoul]

+Kyosuke Sagara Feel like I should try and put some Spinal Tap quote here but I can't quite get it to fit. Anyway, you got the A so the credit is all for you!

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after mygcsescience was no more for a level (clue's in the name) i had no nope. how could i binge videos before every exam to ensure i got a good grade now?? and then someone in my class recommended your channel and with that i have found my saviour. really nicely done videos with nice looking layouts and good explanations that are detailed but summarised!

[@michii9487]

OMFG AFTER 2 DAYS STRAIGHT OF WATCHING VIDS ABT THE HALOGENS, I FINALLY GOT IT BC OF THIS VIDEO 😭😭😭 I COULD CRY TEARS OF JOY RN GNG TSYM SIR 😭🙏🙏

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[@motayee97]

Thought you were going to write 'Not lying' at 25:46 instead of 'Not Redox' XD

[@MrERintoul]

Mo Tayee Haha!

[@usamabinmuzaffar692]

Yeah I thought that too

[@zoons2652]

thank you so much for this i found this topic so hard since o'levels but this video explained it really well

[@dirtydiana9618]

Thank you soooo much for this video! I found it again very helpful :)

[@MrERintoul]

***** Good :)

[@LoveLife997]

Omg thank you so much for this video. I really understand Group 7 halogens now :)

[@MrERintoul]

LoveLife997 Excellent :)

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Doing mocks tomorrow and because of covid I may not have exams so trying my best, this helped so much thankyou!!

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[@borojenxx4193]

omg this was soooooooo helpful, I couldn't understand it in class, and the book further baffled me. Thank you! I have made some very useful notes based from this video. It's 00:55 and I should probably sleep as I'm tired, but I need to watch more of your videos! I have a mock later this week x

[@MrERintoul]

Boro Jen xX Keep up the hard work! But DON'T overdo it. I promise it will not help - find a healthy balance between work and play.

[@borojenxx4193]

E Rintoul there's also another equation i have been taught, it is when the chloric acid further ionises. H2O + HCLO ----> CLO + H3O Do we need to know this ^

[@MrERintoul]

Boro Jen xX I would say no. It is in one of the textbooks I have, but I've never seen it required in an exam...

[@LoveLife997]

This video was very useful and I definitely understand this topic more . Thank you :)

[@MrERintoul]

LoveLife997 Excellent :)

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DiLLZGFX You certainly are...

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[@benjamintempest4333]

Thank you very much E Rintoul! Can I just ask when the bromine reacts with the sulfuric acid does it produce Na2SO4 instead of NaHSO4?

[@KyuuleGamingHD]

It can produce both. On the mark scheme they accept half equations with NaHS04 and Na2S04

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JustAnotherTeen is it tho?

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hm khan No problem at all!

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Thank you my brudda

[@MrERintoul]

Hiqbal4 No problem, chap.

[@simrunali3470]

This video is really helpful, especially after forgetting the complexity of the equations over Easter break. Just wanted to ask what app/ website do you use to make your videos. It would be really helpful to know, so I can make my own summary videos to come back to when I’m studying A2.

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[@uzman3053]

Hey. Very nice video...thank you! But I do have one question. In the beginning in the table the KBr solution turned orange when Cl2 was added because of bromine water being formed which is orange right? And in KI the solution turned brown when Cl or Br was added because iodine solution is brown right? That makes it easy to learn because I already know the colours of the solutions. However, I’m a bit confused at around 29:26 when you said the bromine would produce brown fumes...shouldn’t it be orange? And that the iodine would produce a black solid...wouldn’t it be brown? Please clear up my confusion. This video was great though! It really helped. I’m just confused in one thing

[@abdulhakim9154]

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[@jbsc6180]

QUESTION ………….. Can you use TRANSITION metal halide salts like iron bromide or tin bromide to make the corresponding acid HBr by dripping sulfuric acid on the salt...……….OR DOES IT HAVE TO BE A SODIUM BROMIDE????????????????????????

[@caoimhedonnelly1794]

Do we need to know the equations IF you do NOT add nitric acid to the halide solution? Eg: 2Ag+ + CO3(2-) = Ag2CO3? Ag+ + OH- = AgOH?

[@Mohamed-zy1er]

Late night cramming before Paper 1 tomorrow, I know you're all here for that reason :)

[@hannahmohsen9482]

Just a quick question, you mentioned that you couldn't find an equation for the formation of sulphur in the reaction of Iodide with sulphuric acid but when we learnt it we were also taught H2SO4 + 6HI --> S + 4H20 + 3I2 so I was wondering if this was correct? Thanks

[@MrERintoul]

Hannah Mohsen Yeah looks good to me!

[@jessdadson926]

Hi, I'm a bit confused because in my textbook I've read that when KI reacts with Br or Cl it produces a red solution if you are mean with the amount chlorine or bromine used. And if you use the chlorine or bromine in excess it goes grey and I really don't understand why. So if anyone could help me out that would be very much appreciated!!!1

[@hanamostafa5268]

I'm speechless for how to thank u!! This channel is wow!! though Can u make videos for edexcel chemistry the new specification?

[@rajappana8476]

Why is it that with the naoh in the formation of bleach you can ignore the oxidation states of any compound without a halide in it but in reactions with h2so4 you consider the oxidation state of sulfur in h2so4 and so2 aswell?

[@mujdafy]

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[@ishaahmer4964]

Wouldn’t Br2 produce orange fumes in the redox reaction?

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Literally saving my chemistry grade- especially due to corona

[@sumiyaelmi5638]

quick question based on 29:20 my aqa book says 2H+ +2BR + HSO4> SO2 + 2H20 + BR where as on your video there is no bromines in the second reaction. can you explain why? please i got an exam coming up tomorrow and i really dont understand, i was also wondering since i understood it your way, would i lose marks for not putting the bromine in.

[@MrERintoul]

Sumiya Elmi I don't know whether I'm confusing the question, but at 29:20, there is bromine...?

[@sumiyaelmi5638]

Don't worry about it i looked at the mark scheme for a question based on this, and your explanation is right. its probably because my exercise book has complex compounds.

[@isatoubah3551]

thank you so much.very helpful!!!!

[@MrERintoul]

Isatou Bah No problem!

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legend

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shout out to everyone doing their AS paper 1 tomorrow

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Thank you so much... I wish my teacher could transfer his knowledge across like you do. By the way, may I ask what program you use? Do you use a mac?

[@MrERintoul]

Arman Ashourlou No, I'm a Windows man! It's a program called smoothdraw - try it!

[@persiangulfcat]

E Rintoul Oh. i've got windows too, on my mac. Thanks for letting me know ^.^

[@MrERintoul]

Arman Ashourlou Dual-boot, yeah?

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E Rintoul I used to run windows from a separate partition so i could run it on its own in order to play games, but windows kept messing up after some time for different compatibility reason. So I just installed parallels and now I run windows and mac at the same time on the same partition. But because doing this takes up a lot of ram you can't play major on windows while windows and mac are running at the same time. For me when im using Microsoft office programs, they run smoothy together on 16gb of ram. :)

[@maythuaungwin9748]

Thank you so much! A big fan of yours. Just a quick question, about the Iodide reduction with conc H2SO4 My teacher taught us .... NaI + H2SO4 --> NaHSO4+ HI HI + H2SO4 --> I2 + H2S + 4H2O Is that correct? Or Is it better off me learning your version? which you said is specified.

[@MrERintoul]

+may thu aung win There are various differences with the iodine one. if it was me, I'd use both examples!

[@StudioOAC]

+may thu aung win sorry if i'm incorrect but is the 2nd equation meant to have these products instead: sulphur dioxide (SO2) instead of H2S (also should have I2 and H20? (unless you intended to write this displacement as the last stage of displacement (3rd stage) in which you would be correct).

[@kmas3761]

Thank you soo much 💛

[@TheNathan99097]

at time 29:44 the reaction of Bromine with H2SO4; What was the reducing agent? The bromine? As it is reducing the sulphur whilst oxidising itself?

[@MrERintoul]

F.J Vinzenz I'm a little confused... do you mean bromide? If so, the bromide ion is acting as a reducing agent. One way to tell is that the bromide ion is itself being oxidised from -1 as bromide to 0 as bromine. Does that make any sense?

[@TheNathan99097]

That's perfect, many thanks

[@latestupdatesandentertainm1473]

Plz Can I ask a small question... When u say sulphur dioxide has been reduced is it because the sulphur has been reduced from +6 to +4? Why did you not consider it as separate molecule. I mean just because sulphur has been reduced do we say whole sulphur dioxide has been reduced? Thank you

[@chouxpienuts]

You're awesome. Thank you

[@MrERintoul]

+chouxpienuts You're awesome too.

[@omaralias1201]

Great Video !

[@MrERintoul]

Omar Alias Glad to have helped, Omar!

[@aniqahbuckingham7947]

Thank you so much for the video! So useful! Just liked to correct that halides are oxidising agents becuase they are themselves reduced. But apart from that, great work! Keep it up!

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[@beththomson5750]

Really helpful thankyou 😊

[@afaqbhatti8886]

I thought that br is red-brown not orange ???

[@echo4k915]

In the third reaction for iodide shouldn’t the HI be reacting with the sulfuric acid rather than the SO2 to produce the H2S

[@VK-il9kv]

useful videos thanks

[@zorack4961]

Thank u so much!

[@danyaalq4096]

Thanks a lot for these videos, they really help. About 30 mins in, in the third extra step for iodine, wher do you get the HI from if it had been previously used in step 2? Once again thanks for all the help.

[@MrERintoul]

Danyaal Qureshi It would be iodide ions that still remain from the first step.

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