2024 WAEC CHEMISTRY PRACTICAL (final hints)

#chemistry #jamb #neco #waec #redox #utme #saltanalysis
2024 WAEC CHEMISTRY PRACTICAL QUESTIONS & ANSWERS [ final hints ]
• 2024 WAEC CHEMISTRY PR...
• WAEC CHEMISTRY PRACTIC...
• GCE chemistry practica...

[@lmadeorobosa8132]

You made a mistake on the residue you get on heating the residue. ZnO is yellow when hot and white when cold. On the other hand,PbO is reddish brown when hot and yellow when cold. I'm so happy that you corrected the errors in the first video. Thanks so much for the boldness in making the video.

[@300plusacademy]

For pbo to turn red...you must heat to about 400-480⁰c ( you can't heat to that in ur lab)
Infact, your gas level in the lab won't even allow you do that..at >400⁰c you should have red led(iv)oxide [pbo2]

[@ibechinomsosammy1426]

Big thanks to you and may the Lord continue to increase you🙏🏻🙏🏻❤❤❤

[@300plusacademy]

🙏 amen... & you too... all the best

[@NkemAgbaeze]

Thank you sir
You taught me what my teacher could not teach me 😊
God bless you ❤❤

[@300plusacademy]

It's my pleasure

[@sylvesteretim2556]

Thank you 🙏 sir may God bless you richly ❤🎉

[@300plusacademy]

Amen.... God bless you too

[@JankeyTouray-f9s]

Sir I will make sure i follow all procedures during my exams
Hope I get a good performance in it so that I will come back here

[@300plusacademy]

Definitely....

[@OnyenjiChizaram]

Thank you sir for this understood it more from the practical I need in school..thanks

[@300plusacademy]

You are most welcome

[@AgueleGodwin]

More Grace sir. So are just so good. May God bless ur good works.🙏🙏🥺💙

[@300plusacademy]

Amen...God bless you and yours..

[@300plusacademy]

Thanks... God bless you too

[@areteatimati2116]

Thank you sir for the revision

[@kiujabarde4234]

With what you are doing every serious student must pass

[@StephanieEyikimi]

Thank you sir🎉❤

[@lets_patois]

Does anyone know how we are supposed to deduce the content of C. Say we are asked to state the contents, how do we know that it is (Na2CO3 and Pb(NO3)2. Especially since we didn't test for Na+ ion🙃

[@300plusacademy]

Most welcome

[@christysor5637]

Well explained, thank you sir

[@300plusacademy]

You are welcome

[@FATHIAKEHINDE]

Thank you sir you taught me what I did not know before

[@300plusacademy]

We all learn daily... a continuous thing, not a definite destination.... the world evolves daily, so we learn daily & get better than y-day

[@kingLouis600]

Thanks for such a wonderful video
I appreciate
God Bless You
🎉🎉🎉🎉🎉🎉🎉🎉
❤❤❤❤❤❤❤❤

[@300plusacademy]

You are so welcome

[@joshuatewobola-jq4sd]

Thank you so muchhh!!!
Life Saver 😭😭

[@300plusacademy]

You're welcome!

[@WisdomWavesQuotes387]

God bless you sir

[@300plusacademy]

Amen & you too & yours

[@BenitaUdofia]

Thank you very much sir

[@300plusacademy]

Most welcome

[@KabiruadekunleAbojukoro]

Thank you sir 😢❤

[@300plusacademy]

Most welcome

[@JustinElechi-nu8cs]

Thanks sir....
Please sir I want to know how to make my table and find my reading

[@300plusacademy]

Check last lecture on that ua-cam.com/video/cf1rf72EAzw/v-deo.html
also....a final lecture video on titration drops in 2hours....
Chin up

[@TitilayoOdejobi]

Thank you for the lesson sir, it was really helpful
And I like the song you played before the lesson
I don't know if I can download it so that I can listen to it ❤🎉

[@300plusacademy]

Oh....you welcome....it's a custom made sound

[@conde-usmanadebowale2586]

Thanks, so elaborate

[@300plusacademy]

Thank you

[@PrincessAdaobi-cy6hb]

And also, among the listed requirements for each school, BaCl was required...

[@300plusacademy]

Yes that's normal lab reagent...does not mean...all reagents will be used

[@anthony123159]

Thank you so much

[@300plusacademy]

You're most welcome

[@ChristabelIsioma]

Thanks for the video 🙏 but where does silver trioxonitrate (v) from tge syllabus come in?

[@300plusacademy]

AgNO3....not involved.... here
Since it's not chloride

[@ChristabelIsioma]

@@300plusacademy Ok, thank you sir

[@joshuatewobola-jq4sd]

One question
Is it okay to write Under observation that a pale green solution is formed when FeSO4 was added to the filtrate and then brown ring when conc. H2S04 nwas added

[@300plusacademy]

Just write about brown ring....

[@niffyk8]

The inference for 3iv is wrong
Only Al and zn form gelatinous pb doesn't form gelatinous .
So the inference should be al is present or confirmed

[@300plusacademy]

I spoke on that in the video. ...
Okay then

[@SPIRAL_]

Sir will you be making a video for Alternative B practical?

[@300plusacademy]

Yes

[@300plusacademy]

Trying to get biology out of the way first

[@IykeOkechukwu]

That should be moist or damp blue litmus paper .... Gases will not have effect on dry litmus paper....

[@300plusacademy]

Okay 👍

[@IykeOkechukwu]

It is Zn2+ and Al3+ that gives gelatinous ppt
Ca2+ and Pb2+ gives white ppt......

[@300plusacademy]

Ok

[@FranciscaOnu-fc5vj]

This is actually making sense 😮❤

[@homestylescooking]

Sir, in New school
Zno2+ -when cold is white and yellow when hot
While
PbO2+ - when cold is yellow and red when hot

[@300plusacademy]

Red...if you can heat to >400⁰c.....
the heat you have access to in the lab...can't even reach that before you break your boiling tube at max 140⁰c for pyrex glass..
So deaden this red colour idea already

[@PrincessAdaobi-cy6hb]

A question Sir, For the brown ring test, you wrote NO3- confirmed.
But someone else told me it's actually NO2 from NO3- that is confirmed.
Is that also saying the same thing?

[@300plusacademy]

Yes same thing

[@areteatimati2116]

Sir, you know we ended up identifying NO3-, would we also have to find a way to identify Na+?

[@300plusacademy]

No visible reaction for Na,k

[@areteatimati2116]

@@300plusacademy Ok, thank you sir

[@SprintFlash_MC]

Thanks, this is really helpful.

[@300plusacademy]

You welcome

[@olaiwonbolanle6762]

Thank u sir 😊

[@300plusacademy]

Most welcome

[@adisamonsuru1844]

I think PbO is red when cooled

[@Feliciafomonefe74]

Why did you not write anything concerning; the second portion of the residue+dilute HNO3

[@300plusacademy]

Check final hints
ua-cam.com/video/LrUD3PtIcfE/v-deo.html

[@300plusacademy]

I did though

[@OkoliBiere]

Thanks, but I think Pb2+ gives black ppt on adding HCl

[@300plusacademy]

Unfortunately NO...

[@kaitheamineguy3969]

It gives black ppt on ethanoic acid

[@FavourAchile]

Sir don't we have to show what happens(i.e record our observation) when we add FeSO4 to the filtrate first and then record what happens when we add H2SO4? Won't we lose a mark if we don't?

[@300plusacademy]

Check the videos....I did record observation for that

[@onakoyaoluwakemi6701]

thanks

[@300plusacademy]

You welcome

[@joshuatewobola-jq4sd]

Funny I'm here on the day of my exam
Well...😂😂

[@300plusacademy]

All for the best....

[@PinkyPen]

But that question 3v KMNo3 can be used.

[@300plusacademy]

Nope

[@olapadeempire]

This is alternative practical right

[@300plusacademy]

Nope....real practical

[@kaitheamineguy3969]

What about the Na+ ion?

[@300plusacademy]

No visible reaction...for k+ & Na+ using NH3 or NaOH...
So you will not be testing for Na+

[@kaitheamineguy3969]

So no flame test needed?

[@akinrinadegbenga1960]

Should we put down the equation when doing the question

[@300plusacademy]

The equation will naturally come with the question...
It will be given

[@StickmanVisualizer-pz1oo]

From the previous videos, you treated the volumetric and quantitative analysis, but what of the qualitative part?

[@300plusacademy]

There are two videos on qualitative analysis
ua-cam.com/video/W3KZ95M0hX0/v-deo.htmlsi=fczqbL7LxbsmYxm8
ua-cam.com/video/LrUD3PtIcfE/v-deo.htmlsi=9Z6rSNogsBPNc1Sm
Please do ensure you subscribe to this channel

[@bestodama9804]

Why can't pbco3 dissolve in water

[@300plusacademy]

Cos all trioxocarbonate CO3²- are insoluble in water. except for Na2co3, k2CO3, (NH4)2CO3 which are soluble in water

[@BisiriyuoOwolabi-mc4ox]

I appreciate a looooooot🎉😢😢😮

[@300plusacademy]

Most welcome

[@FavourAchile]

Sir in the inference can we write that C is a mixture of sodium carbonate and lead nitrate? Or C is a mixture of Soluble and insoluble salt

[@300plusacademy]

Never mention sodium carbonate and lead nitrate....it's not your business....
C is a mixture of soluble and insoluble salt simple

[@NathanielIzu]

❤❤❤

[@anthony123159]

Is this the exacT question

[@300plusacademy]

Take seriously....your exam questions is going to be a replica of this

[@FavourAchile]

Sir we did the practical today with our teacher and we got a white chalky filtrate instead of colorless, and our teacher said we should go ahead with it. What went wrong?

[@300plusacademy]

Oh well....it's left to you to decide

[@joshuatewobola-jq4sd]

He didn't filter it well

[@joshuatewobola-jq4sd]

My teacher filtered it twice for it to come out well

[@SamuelDavid-uv6pt]

Sir give us the end point

[@300plusacademy]

Ask ur instructor

[@nwanjairuka]

Thank you sir

[@300plusacademy]

Welcome

[@SamuelDavid-uv6pt]

Is this the real salt sample

[@300plusacademy]

Yes

[@MayaMeverick]

How show are you that this is what is going to come out

[@300plusacademy]

I have been doing this for over 10years...
Though not on youtube...& it's always been on point...
Follow who know road...

[@JulietAkudo-mw6mg]

M asking the same

[@_.horse_lover._]

So can I be sure 100% or 95% that this is actually going to be the questions​@300plusacademy

[@nwaezimmadu]

It's from the yellow paper

[@IkechukwuOnwochei-zh6lg]

Hi, good work. But in the specimen provided, there is no conc. H2SO4 so how will the brown ring test be carried out?

[@alashelaoritoke8329]

It is provided
My teacher was using it today

[@300plusacademy]

Just an oversight by waec...
Fond of doing that

[@alashelaoritoke8329]

It's white cloudy or chalky precipitate sir

[@300plusacademy]

I explained that in the vid already....
Pb²+ & backed it up with 2008 waec 2d...

[@kelechiezeorah4619]

New school chemistry used "white powdery".

[@300plusacademy]

@@kelechiezeorah4619 ok

[@Kosisochukwu-rv2ff]

Sir u are wrong u only get a yellow color when filtrate reacts with potassium iodide paper

[@300plusacademy]

Nope...
K2Cr2O7 & potassium iodide gives same yellow precipitate

[@donaldsonbuoro886]

Nice one

[@300plusacademy]

Thanks for watching

[@Lydia_graphics]

Thanks sir

[@300plusacademy]

Welcome

[@elijahskillful3357]

Thank you very much sir,
Please can I reach out to you
I'm a chemistry teacher please 🙏

[@300plusacademy]

@[e-mail]

[@elijahskillful3357]

​@@300plusacademy I have mailed you please

[@OlayemiDorcas-iq7cb]

Is this for alternative B 2024.???

[@300plusacademy]

Loading.....

[@OlayemiDorcas-iq7cb]

Or is it for alternative A ??

[@BlessingPonjul]

❤

[@300plusacademy]

🙂

[@coach-francis7]

I will pass after watching this video sir

[@300plusacademy]

Rooting for you... go get it done 💪

[@olaosunoluranti1974]

Very helpful thank you sir

[@300plusacademy]

Most welcome

[@TimilehinSambank]

Hello 👋 it sam

[@300plusacademy]

[e-mail]

[@Sunmola]

Ok pp ll

[@300plusacademy]

Ok

[@igbinigieprincess2903]

Success Amen 🤲🧘‍♀️🙏

[@300plusacademy]

Ameeeen....thanks

[@kiujabarde4234]

With what you are doing every serious student must pass

[@niffyk8]

No 3iv the inference is wrong
Only Al and zn form gelatinous . Pb doesn't form gelatinous in the inference Al is confirmed

[@SamuelDavid-uv6pt]

Sir give us the end point

[@300plusacademy]

Use that of your instructor

[@sarahibiede9899]

Thanks sir

[@300plusacademy]

Welcome

[@kiujabarde4234]

With what you are doing every serious student must pass

[@kiujabarde4234]

With what you are doing every serious student must pass

[@JulietAkudo-mw6mg]

That's if it actually comes out this way on Thursday 😢

[@300plusacademy]

It's coming that way....some things don't change

[@300plusacademy]

..as it should be

[@ChizobaUgochukwu-qf1et]

​@@300plusacademy meaning??