GCSE Chemistry - Tests for Anions - Carbonate, Sulfate and Halide Ions #65

This video covers:
- How to test for carbonates by reacting with an acid and then bubbling the gas through limewater
- How to test for sulfate ion with dilute hydrochloric acid and barium chloride
- How to test for halides like chloride, bromide and iodide ions using dilute nitric acid and silver nitrate
Exam board specific info:
AQA - Separate/triple science only
IGCSE Edexcel - Everything is suitable for you course!
Edexcel - Separate/triple science only
OCR 21st Century - Separate/triple science only
OCR Gateway - Separate/triple science only
Maths Playlist:
• GCSE Maths (9-1)
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video

[@homelander9008]

probably the worst topic in chemistry

[@ChineseUrmom]

IKR UGH

[@sazidhasansafwan]

Couldn't agree more

[@pula18s]

Yup X(

[@user-ve8df8xs7f]

Totally ugh 😣

[@ZoRo_x10]

So true

[@what_should_i_call_myself4382]

do a vid for cations, pls. Ur vids are soo good, and it helps my revision soo much

[@robloxmaster2096]

Fr

[@akshayaravi2360]

Just in case if anyone was wondering @3:19 why we add nitric acid instead of hydrochloric acid while testing for halides, even though the job of both acids is to remove anions. Hydrochloric acid contains chloride ions which is a halide, so even if the sample ur using doesn't contain halide ion we will certainly get a precipitate.

[@afifaarmoghan2459]

OMG TYSM I WAS WONDERING ABT THIS TYY

[@mehiamawesome0609]

Well the difference between the two acids lies in that nitric acid is an excellent oxidizer I just don't know how that helps in this case...

[@Shelbyy476]

Yes, And also because all nitrates are soluble.

[@agravemisunderstanding9668]

That's very smart

[@dorajona6627]

Thank you for this Can we use sulfuric acid? When testing for halides?

[@koyel218]

You have absolutely no clue how much you've contributed in helping me learn all the sciences and math. My teachers were either not teaching in an efficient way or were going too fast for me to understand. Then I looked lessons up in KZbin and found this channel. I appreciate your work so much please keep it up. I cannot thank you enough for this. You're a saviour

[@mintstarfactz5115]

Fr

[@GamezMasters]

Fr

[@marths7894]

thank you so much cognito for all the science help you've given me this year, i dont know what i wouldve done without it💛

[@mariyamajaz]

OH MY GOD! You just cleared up my whole concept in 5 mins, this is smth my teacher couodnt do in 2 weeks!! Hats of to you, GR8 VID

[@ishbatshahrin1894]

00:26 carbonates 01:31 sulfates 03:01 halides

[@nabeelahmed4862]

Thanks

[@noraelasri3861]

may both sides of ur pillow always be cold

[@samar-kv2pu]

may your charger always work properly

[@mehiamawesome0609]

Maybe your USB always dock perfectly first try

[@t4aha.s]

May your feet always be safe from legos

[@skullz9366]

yo this helped me so much thank you so much teacher never explained the purposes of the acids and i got so confused. Appreciate the help alot

[@ghpremixes270]

you have helped me so much for revising chemistry and biology for my exams, thank you so much!

[@aquatix7261]

bro i cant express how useful u r omg

[@azharimran1969]

This is really helpful thank you!

[@ziyinglim4917]

Explained it way better than my teacher! I have a test this Friday and this is very helpful. Thanks 🥺💞

[@aisha-uo9zs]

these are by far the best videos! but we need a cations video!

[@jamesfisher4870]

Test for sulfates came up on the test and I think I got it correct! Thank you so much! :)

[@Ozred]

Your videos are really helpful, please make a video on tests for ammonium, Chromium and zinc (caions).

[@AoxYT]

very easy to undestand, thank you

[@sayedarinaakter3591]

Really saved a lot of time,,thanks

[@jayhoon_supremacy6913]

this is rly helpful for my chem test tmr,thanku!!

[@diriliseditz1485]

Very cool channel for GCSE pleasure to be here

[@doctorvelvet1067]

Hello thank you for this video it is really helping, when are you going to put up testing for cations? Could you please let me know:)

[@WhenThingsGoWrong]

Thank you for this video. You saved my life with this.

[@LynxMajic]

Thank you again! I could not find videos for the cations tests (with sodium hydroxide) and the flame tests (lithium, potassium, etc). Are you gonna do these as well one day?

[@emanhassan3500]

This video greatly helped me thanks for sharing it😌☺️☺️

[@lisamwembia7781]

thank u sooo much ... writing my mocks tomorrow !

[@loki9333]

Love it. Thank you. Keep going❤

[@gogirl4167]

this was very helpful thank you

[@engysamad1]

Ur videos save me a lot from hating chemistry. u are the star of all science videos. Thank you.

[@Cognitoedu]

ah thank you so much Engi, glad you're enjoying the videos! 🙌

[@hmgofranuddin5753]

It's really helpful...thanks

[@Shelbyy476]

You guys are amazing ❤️

[@Urm0mg3y]

Can you also make a video on tests for CATIONS?

[@ameerasyeda429]

Test in an hour thank uuu

[@frostbite4861]

Isn't there also a way to test each individual precipitate formed in the Halide test with dilute/concentrated ammonia to differentiate between them?

[@mstsamsunnahar538]

thank u so much,, from Bangladesh

[@abenayasuntharakumaran6194]

What about the tests for sulfite ions and nitrate ions? They are also in the syllabus right?

[@muhammada.muhammad6287]

really very helpful

[@lelouch8470]

POV:you’re watching all the ads to give this guy more money! He deserves it

[@FonfangsabiAnoh]

Thanks alot for that

[@sayaljoshi4331]

Wow i can't thank you much for this video🌟🌟🌟🌟🌟

[@graceheaven5181]

This channel is just the thing we all needed, thank you cognito! 🎉 Also could U pls do a vedio for the test for cations as well? Also, can anyone tell me...in the test for halide ions, in the first step of each, do we add nitric acid to each sample or is it just for chlorine?

[@angelamcleod652]

Thank you

[@dealitwithit9398]

Love it is there one for nitrate?

[@diannegerald6676]

for the test for sulphates if u add the barium first then the acid what would be seen

[@foxzy1469]

Just to let everyone know, if you are doing AQA you also need to know about identifying metal ions by reacting with sodium hydroxide. Here is what you need to know acording to AQA: Sodium hydroxide solution can be used to identify some metal ions (cations). Solutions of aluminium, calcium and magnesium ions form white precipitates when sodium hydroxide solution is added but only the aluminium hydroxide precipitate dissolves in excess sodium hydroxide solution. Solutions of copper(II), iron(II) and iron(III) ions form coloured precipitates when sodium hydroxide solution is added. Copper(II) forms a blue precipitate, iron(II) a green precipitate and iron(III) a brown precipitate.

[@florencejhones3504]

Is this for combined or triple science?

[@foxzy1469]

@@florencejhones3504 I believe it is for combined

[@belmont5128]

God like video thank you so much

[@ragnability4232]

Please could you make a tutorial on Testing for Cations?

[@nabagadget5743]

Can you do one for cations please

[@paulinaampadu5887]

bless your soul❤️

[@chipchapchop5808]

thank you for this helpful video, although could I ask at 2:35, when adding the acid, how do you know that it will only react and remove carbonate and sulfite, and not react with the sulfate itself? thanks :)

[@fatima_ig]

Hello well it actually reacts to remove them yk for example nitric acid reacts with any carbonate salt forms Co2 this means that all carbonate has reacted and no traces of CO3 is left over

[@fatima_ig]

And also when nitric acid reacts with SO3 it forms SO2 which is also a gas that escapes just like CO2 so now nitric acid has removed both CO3 and SO3 traces as all of the anions have reacted with nitric acid to form colourless gases hope this helped

[@fatima_ig]

And also the nitric acid if it reacted with sulfate ions it will form water soluble substances you know so we add Ba2+ to form the insoluble product at end of reaction so we will filter it to remove as residue

[@jamalpov]

ty dude

[@brozone189]

do a vid for cations!!

[@jamesonwuka7668]

Is this useful for igcse, also love your videos!

[@watchcloud8187]

Can you make a video on test for cations?

[@sohaibhassan5043]

Can u do one for cations

[@pizzapoop]

please can you do a video for cations

[@aditijain3516]

can you also give for cations pls

[@EveryoneHarmonyPeace]

That is a lot to remember.

[@saragupta462]

hiii could you pls do the vid for cations asw pls

[@tumusiimegloriax]

God bless y'all

[@accessnft1702]

AMEN ❤

[@bonbonpony]

01:00 Would other acids do too? E.g. sulfuric acid, or acetic acid (vinegar), or citric acid perhaps? 01:14 Carbon jerkxide :) BTW why does the carbonate ion decompose into CO₂ and H₂O after reacting with acid, but it doesn't decompose while it is a part of some other ionic compound? 01:41 Great, so now I need to figure out where to get barium ions from :q 02:20 So, could this be also turned into a sulfite ion test? E.g. if the barium test gives positive result without the HCl, but turns out negative if we add HCl before the barium test (which removes the sulfide), we may suspect that sulfide ions (not sulfate) might have been present in the sample, right? (After excluding the carbonate, that is.) Or maybe at least could this be used for purification of sulfates? (Removing carbonate and sulfite impurites with that HCl) 03:23 So the reason we use nitric acid instead of hydrochloric acid this time, is because it doesn't introduce any chloride ions that would mess up with our test, right? (Hydrochloric acid would introduce chloride ions.) But both acids are equally good for removing carbonate and sulfite ions, correct? 03:35 Let me guess… This one comes from dumping some silver metal into nitric acid, right?

[@abenayasuntharakumaran6194]

why is HCL used along with chloride in the test for carbonates and Nitric acid along with nitrate in test for halide ions? is there a reason for it?

[@abenayasuntharakumaran6194]

sorry I made a mistake why is HCL used along with chloride ions in the test for Sulphate ions

[@abenayasuntharakumaran6194]

PLEASE REPLY.....

[@darkrebel5520]

@@abenayasuntharakumaran6194 Hey man, I think you mean why is HCl used instead of HNO3 when testing for halides. I think its cos if you add HCl to a solution, and then you test for any hallide ion, you will get a positive test for chloride because HCl itself contains chloride ions

[@hoblex2894]

question aren't halide ions supposed to be diatomic? thank you

[@fatima_ig]

No HALOGENS ARE DIATOMIC BUT WHEN CHEMICSLLY COMBINED WITH A CATION IN AN IONIC COMPOUND THE HALIDE ION IS JUST THEITS NO IN FORMULA for eg in NaCl there is one chloride ion while in MgCl2 there are 2 chloride ions

[@mr.random8370]

tomorrow I have igcse chemistry P1 exam

[@moinuddinsiddiqui912]

HEY COGNITO ! can you make MORE VIDEOS of all the topics its understandable surely you will get more SUSCRIBERS and LIKES 🤝

[@puteri2133]

Not me watching this a few days before my practical test haha🙃

[@shivanjanachauhan7626]

Me too

[@Emnijiha]

BRO SAME

[@user-bl6gg9nh2d]

Not me watching this last min

[@Emnijiha]

安琪 how did u do bro bruh they do be asking anion and cation shit like no i dont know stop

[@user-bl6gg9nh2d]

@@Emnijiha I messed up the observation and inference don't get me started 👁️💧👄💧👁️

[@tohyongcheng1230]

hiii just want to ask how hcl and hno3 remove co3 and so4?

[@noraelasri3861]

they react together to form gases and the gases evaporate out

[@akshayaravi2360]

@@noraelasri3861 thank you bro i was also thinking the same question

[@noraelasri3861]

@@akshayaravi2360 no problem bro

[@Appleroyaleor]

I am done for the day

[@AlwaysOnHeightFN]

shut up, you are clearly not done for ANY day. You have HEEPS of work to be catching up on and many new topics to learn. Please stop lacking, get off tiktok, stop scrolling on reels, shorts or snap or whatever you use and focus the frick up buddy. If you do not begin to perform well academically in the next school year I will personally fly to your house and do BAD things to you xoxo.

[@ccn690]

❤️

[@idkman5167]

*carbon droxide*

[@topten1444]

wondering how tf ill remember this

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pov youre studying for igs

[@EcoHotdog]

‘Positive result’ - fuse school

[@slimemonster3797]

Watched dis 2x cuz i be confused af

[@Maryam-uw3xx]

😹

[@robomankiller2169]

Chemistry online lessons are horrible

[@maryamchannel3566]

Chemistry itself is horrible let alone online lessons

[@metamorphosis6061]

Really hoping to see a video on cations too 😭❤️🤌

[@cristal26t12]

Thank you