Testing for Ions | AQA Required Practical 4 | A level Chemistry | Question Walkthrough

Testing For Ions

A level Chemistry
AQA Required Practical 4
OCR PAG 4

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[nahdontdomelikethis]

I think you actually saved my chemistry a level, I by chance came across your paper 3 predictions video and am now head down watching all the videos on this playlist and the multiple choice playlist. I wish I had found this channel before, I cant thank you enough for this !

[safam_]

Thank you for this. I never actually understood this before and now I do!!

[homairab]

for the last q, when adding AgNO3, the carbonate ion would react and form AgCO3(also a white precipitate), instead of adding more acid, can i say bubble through limewater, so effervescence of CO2 is produced?

[Gob_]

Question 2b. Should we know that Aluminium dissolves in excess NaOH. Has it got something to do with the fact that Al and Mg are both period 3 elements

[Katie-kzui]

Hi, since the practical is linked to amount of substance, is it likely you will need to know all the reactions/method? Thank you :)

[theunknownchampion]

Hi will you ever make exam question videos on the other practicals for aqa? Would be great!

[alirezaibrahimi]

i really like these exam question walkthrough videos. Glad i found your channel

[ImranAwan-ns]

For question 2b, is NaOH not used to test for chlorine rather than Mg or Al? How would it differentiate between metals in 2 different groups?

[kz]

Al3+ ions came in paper 3 and I only knew cause I watched this video Thank you so much

[Emma_Elisabeth]

could you react with conc H2SO4 to give misty fumes of HCl and HF and then differentiate those with AgNO3 ?

[ImranAwan-ns]

For question 3, how would you know which equations to write down, and why wouldn't you write the equation for the reaction with fluorine?

[Sidhshsu]

would i lose marks for saying bacl2 + hcl on second question

[fhrlkrx]

don’t have to do my hw now. Beautiful.

[ImranAwan-ns]

Why would sodium hydroxide differentiate between magnesium and aluminium?

[haseeb_lds]

Where can I find more Rp 2, 4 and 7 exam questions? I cant find prac 4 Qs anywhere?

[LibbyThomas-elpg]

why do we need to add water for the last question

[alexratcliffe]

at 9:35 you said you would have to add acid separately to the acidified silver nitrate to find the carbonate ion. wouldn't just doing the one test work as there is acid in the first test

[lareenahmad]

sir i don't understand how RP4 is linked with amount of substance?

[anitaa]

For question 1, how do you know its mgOH2?