AQA A-Level Chemistry - The Alkaline Earth Metals (Gp. 2)

[@deskpc2905]

this dude ia underrated. He teaches and points out a lot of good points

[@M3HAN]

Awesome vid! I'd just like to point out something to any student reading this. By using HCl or NHO3 (Nitric Acid) this removes ions,specifically carbonate ions. This is very important since *BaCO3* (Barium Carbonate) is *also a white ppt*, so its indistinguishable from BaSo4 (Barium Sulfate). So by acidifying it first it removes the carbonate ions so you know the white ppt formed is 100% BaSo4. :)

[@MrERintoul]

***** Good points there - thanks!

[@data7200]

Thank you for your comment. But I still have a question CaCO3 + 2HCl -------) CaCl2 + H2O +CO2, so although the hydrochloric acid is removing the carbonate there is still Calcium chloride left. Does that not matter, and if not do you mind explaining why? Thank you :)

[@data7200]

@@MrERintoul Thank you foryour video I still have a question if you don't mind answering ? CaCO3 + 2HCl -------) CaCl2 + H2O +CO2, so although the hydrochloric acid is removing the carbonate there is still Calcium chloride left. Does that not matter, and if not do you mind explaining why? Thank you :)

[@bixstar1469]

thanks now i know where the CO3 molecules came from

[@selenaramoutar7158]

Thank you!!!!

[@M0TH3RF00K3R]

I was getting grade Cs and Ds in Chemistry before I found your videos, now I'm getting As!! Thank you so much for taking the time to make them, they are helpful beyond belief! If I pass this A level it will be because of you!

[@MrERintoul]

Emma Lennox Great news! Well done, you!

[@bixstar1469]

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[@bazi5646]

You just saved my A-levels. I can't thank you enough, Mr Rintoul. I've been getting E's all year, and it's a miracle that I've found your wonderful channel! I've never understood chemistry well enough from my teachers, or even tutors I got, but with your lessons, it's like magic! Whilst it's a little late with my AS (I wish I found you sooner), I'll definitely be using your videos for my A2 year and push to an A*. Again, thank you so much for everything.

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What did you get

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Tell us the grade Bazi

[@musaa5414]

‘So the group 2 elements are, um, well, the group 2’ All I needed

[@borojenxx4193]

Thank you, I like how you summed it up in such a short amount of time with everything we needed to know. I learnt more in those 15 minutes, than I did in like 3 hours of class and 2 hours of reading :) x

[@MrERintoul]

Boro Jen xX I'm very glad!

[@rafhi97slem]

+Boro Jen xX I agreee!

[@sami.1]

Sir, you are a legend.

[@ImranKhan-wd9gp]

Just wanted to say thanks for the effort you have made in making these videos. They have been incredibly useful!

[@MrERintoul]

No problem at all!

[@sahirakhan12]

thanks you so much for all the videos, they make life lot easier only if teachers in college could make it so simple. thanks for all the effort in putting these together so close up to the exam, I'm sure every body will appreciate them.

[@MrERintoul]

I'm glad they've been of some help!

[@bobross3573]

You are my new favourite person. These videos are fantastic

[@MrERintoul]

You are a very kind man (or woman), Bob. Much thanks!

[@Sonnwct]

been 4 years and still saving lives.

[@Bradley-Green]

9 years

[@abdullahsaim5593]

Got my Chem As level this month and I am here studying and THIS DUDE IS A LIFE SAVERRR, I hope I ace my exam

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how did you do?

[@awanisreze425]

Your videos are magic. I dont really undersand my teacher's lecture. But yours, though short, I understood more!!! thanks

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You said they will lead us into alleyways. My mom always told me not to follow random strangers into alleyways so I'm afraid I can't do that.

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I fear no man but that thing, alleyways. Its scares me !

[@user-dm4ci3ye4f]

Thank you so much for your video's. They are so helpful especially for us students going through the new syllabus for the first time!

[@JuiceBoxBoiii]

Hi! I am doing AS Levels! This is extremely helpful! Thank you so much.

[@dirtydiana9618]

Thank you soo much for this video again!! :)

[@MrERintoul]

***** No problem! :)

[@rebekahhughes9177]

Okay you need to come work at my college and be my chemistry teacher like now!

[@MrERintoul]

Rebekah hughes Haha, get me a job there then!

[@sammyownz1368]

E Rintoul In my school, many teachers are leaving including one of the AS chemistry teachers. We could do with someone like you!

[@MrERintoul]

Sammy Ownz That escalated. Why are they leaving?

[@acemaths7793]

+E Rintoul lel

[@Pakisoldier39]

+E Rintoul come to loxford there are no standards you can get in easily and the pay is high

[@KaHeiCheang]

what a wonderful video! Helps me a lot! Thanks million!

[@MrERintoul]

Edgar Cheang No problem!

[@shirleyzhang7561]

i am in yeah 7 this is not my laptop but I love science

[@arbabqamar9941]

Nerd

[@supersimple1686]

Believe in yourself and work hard. There isnt enough time especially at year 12 to follow your dreams

[@spine747]

Lol work hard, but um, why here?

[@zzey]

@@spine747 he probably found one of the computers still logged in and this being the video in the tab

[@oesaasdsawas]

@@arbabqamar9941 Nerd? i dont see how-

[@anastasialara5205]

bless your soul

[@emmanewton6417]

you make everything make so much sense! thank you!!

[@ceejaya-l236]

Thanks such a big help got my AS in a week man so stressed thanksssssssssssssssssss Soooooooooooooooooooooooooooooooooo much

[@jamilahadam9717]

Ceejay A-L sameee. Tomorrow we’ve got this😭😭😭🙌🏾

[@syndrose3983]

This is really really helpful I learned so much from this video and the halogen one too

[@joshteale8057]

thanks dude, I have my as isa tomorrow all on backwards titrations and group 2 metals, hopefully this will help :)

[@MrERintoul]

Josh Teale How did it go?

[@hamaadsiddiqui5480]

@@MrERintoul Well mine went great :D

[@AsiansCrazy]

you are brilliant..

[@venom_7_deathstalker_77_6]

Thanks a lot sir ...... The question of solubility of group 2 was asked in October/ November 2019.... Of hydroxide

[@dinnythesaurus]

Just uh saying hi to all the future a level students as of 2021 👋 good luck :)

[@jen3221]

At 9:03 you said that MgSO4 is insoluble,but aren't all sulfates soluble?

[@niallcaley695]

Can you add what happens with magnesium and the extraction of titanium and CaO/CaCO3 in removing SO2 from flue gases? Thanks! Btw great vid really helpful for revision

[@YashVerma_twistedsoul]

I liked this video, will help many however there is one piece missing. I think you should've added the flame test of each element i.e. Magnesium turns white, Calcium turns brick-red, Strontium gives scarlet/ red colour and Barium gives an apple-green colour. Also, I think you've missed some part of the syllabus including reactions of group 2 with dilute acids, nitrates and carbonates and thermal decomposition of nitrates and carbonates.

[@MrERintoul]

Yash Verma Thanks for your comments - but I have a few of my own... Strictly speaking, I'm not sure that the white colour you see when burning a magnesium strip is classed as a flame test. My understanding is that magnesium ions in some sort of ionic compound will not actually give a colour when placed into a flame. Also, there is no requirement for flame testing in the AQA specification hence the reason that I didn't cover it... Again, those latter points are not required as per the AQA specification... I don't mind you leaving comments, and I'm always open to corrections when mistakes have been made, but it's really important that you are sure that there are mistakes before you try to point them out.

[@victorpaul6748]

Keep up the good work sir! Thank u

[@hajiraafzal3681]

goat!!!

[@moneyhoneyhoney9047]

Great video really very helpful

[@MrERintoul]

moneyhoneyhoney No problem!

[@millicentmumbi7816]

Thank you so much for your videos. Could you please cover period 3 elements and their oxides? Many thanks

[@dakotafireshard7367]

hi would we need to know why Mg reacts differently with steam as opposed to liquid water? so for example could an exam ask "mg reacts with water differently when water is gas or liquid, why is this?" thanks for another great video :D

[@MrERintoul]

Dakota fireshard Not why, just that it does!

[@abr3703]

you are amazing

[@chun5258]

Do we not need to know about the flame tests for the halogens? loved the vid

[@gekow98]

Could you go through the testing SO4 part again? Do you add the HCL first or the same time as the BaCl2? The equations does't make quite make sense to me either. The second one does about the formation of Barium Sulfate I understand that.

[@MrERintoul]

abdi hussein You would add the HCl first as it says in the video. The reason for the HCl is to remove anything that may interfere with the test, particularly something that would give a false positive. With regard to the equations, whilst I will try and help, you've been far too vague. What is it you don't understand?

[@gekow98]

Is the H2SO4 in the eq. just an example of something that is a sulfate we could test?

[@evejones4885]

abdi hussein yes

[@hafsakader01]

you havent mentioned about the use of magnesium in the extraction of titanium and that the use of calcium oxide and calcium carbonate to remove so2 from flu gases

[@tanzilaaziza1728]

Thankyou so much, can we have some of the more reactions they undergo and other properties please?

[@oneflare9811]

barium is an underrated metal

[@omaraljbr8048]

hi, is there any chance you could cover analytical techniques please?

[@MrERintoul]

I can try and get it done tonight... I can't make any promises though...

[@EditorsCanPlay]

E Rintoul Please do analytical techniques it's the only thing i find difficult!

[@MrERintoul]

Done! AQA AS Chemistry - Analytical Techniques

[@jahidur11]

in OCR we have to learn about the reations with dilute acids is the the same for AQA?

[@4dr_14n2]

How about Thermal Stability and Carbonates?

[@moleyman97]

On a resource given to me by my teacher it says that Magnesium does not react with cold water and only reacts with steam to form MgO but at 3:26 it's show to react with water to form Mg(OH)2, anyone know which is correct, or which AQA treats as correct, thanks for the video :)

[@MrERintoul]

Harry Daley I promise you that magnesium does react with cold water - although not a fast reaction, you can watch it occur in a lab! As far as the products that you mentioned, the hydroxide is formed when magnesium reacts with water yet the oxide is formed when it reacts with steam!

[@kalynamccool4730]

E Rintoul Yes that's what Ive been told - that Mg reacts with cold water just very slowly...x

[@MrERintoul]

kalyna McCool Yep, that's right. But because a reaction occurs, it forms a new product - in this case, magnesium hydroxide.

[@teejteek6498]

Thankyou👍👍

[@Jason-wp2nq]

Two days till exam. Last minute revision.

[@SasukeUchiha-gx6jg]

Year 13 mocks by any chance? xD

[@dlwz9743]

My exam is on tmr. Wish me luck :)

[@kalynamccool4730]

thank you for this video from Derby :D x x x x x x x

[@MrERintoul]

kalyna McCool No problem!

[@4dr_14n2]

your dabest thank you soooooooo much

[@igetbucketz]

where r u now??

[@matthewwhite5462]

good luck today aqa peeps

[@aminashakeel8202]

98 present

[@zorack4961]

🖤

[@daniyalharoon639]

lvl

[@the_hasnat]

FACE REVEAL plz.

[@MU_700]

I'm legit gonna be pissed if he posts a video on transition metals after exams 😭

[@aqi4162]

Didn't really like the layout of this vid. Quite unorganised. Would be better if you focused on Oxides, sulphates and carbonates separately and also trends would have been nice to go over

[@anasaleem1]

I skip your video bc of ur super radio voice