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@Beautifulday1231r 12 күн бұрын
Thank you can you make a video on buffers and hard calculations on OCR A chemistry or those paper 3 practical questions
@CamScience 12 күн бұрын
@@Beautifulday1231r practical tips are there for ur reference
@CamScience 12 күн бұрын
@@Beautifulday1231r partition coefficient and acid base Equilibria is also there but buffers yes can be added
@Beautifulday1231r 11 күн бұрын
@@CamScience Thank you so much for your hard work! Could you make a video about hess law, entropy as well
@yaya-yc2rm 15 күн бұрын
❤merci
@Tsuuyoka 16 күн бұрын
For e(i), how come it is not multiply by 2 when finding percentages error?
@CamScience 16 күн бұрын
@@Tsuuyoka coz the volume is measured just ones. No initial volume measured
@MohamedFariq-zo1cv 17 күн бұрын
So, second order, if both half life different?
@CamScience 17 күн бұрын
@@MohamedFariq-zo1cv second order if half life increases
@xuenwen 16 күн бұрын
@@CamScienceif I use the value of 8.6 and 11.0 (given), will I get the marks for mentioning that it’s a second order reaction ?
@CamScience 16 күн бұрын
@@xuenwen but u don't get 8.6 and 11.still if u have written so, u won't get marks for coordinates but yes u will get marks for ur conclusion.
@gamuchirainmago3328 18 күн бұрын
thank you for this , its very helpful indeed
@alvinamone4235 18 күн бұрын
do 41 and 42 mj 24
@CamScience 18 күн бұрын
@@alvinamone4235 41 will be coming today
@ShamoogaChinapien 22 күн бұрын
Thank you very much it was very helpful ❤❤❤
@randooooooooom 22 күн бұрын
thanks for all the help, exam is in 47 Minutes!
@litask9773 22 күн бұрын
Exam is literally 1hr 19mins from now Thanks for the detailed explanation of p5
@CamScience 22 күн бұрын
@@litask9773 all the best
@itookapillinibiza1209 22 күн бұрын
15:39 where is the 0.050 from?
@Leo.tae17 22 күн бұрын
the mole of cao used look in step one ....the same mole is used for experiment two
@lefikamaje 23 күн бұрын
Aren’t we supposed to change the 62’C to Kelvin in 1(g) 15:50
@f.r.i.e.n.d.l.y 23 күн бұрын
The 62C is the change in temperature (final-intial temp) if you change both final and initial temp from C to K and subtract you'll still get 62
@dectotee4661 24 күн бұрын
Hii for (e) ii) why cant u say not all volume of solution C is added?
@TheSecondSite 23 күн бұрын
Are you writing on Friday also?
@dectotee4661 24 күн бұрын
Why do u not put negative on gradient?
@SkeleFang 15 күн бұрын
Yes she missed it
@idkname007 26 күн бұрын
For aii why don’t we need to remove the water from the hydrated salt first?
@CamScience 26 күн бұрын
@@idkname007 as moles of hydrated and anhydrous salt remains same and we have calculated mass of hydrated salt to be weighed
@mdasc24 27 күн бұрын
Bb
@anishadithyah2907 29 күн бұрын
13:57 Reaction is not *complete*
@richierichard7 Ай бұрын
Hello for chemistry p5 or in general is it as strict as physics for number of sf or can leave final answer to 4-5 sf?
@CamScience Ай бұрын
@@richierichard7 they may mark u for such answers but it is prefered to use 3sf
@chinyuandrew7973 Ай бұрын
12:55 Hii for ii) can I write use thermostatically controlled water bath?
@CamScience Ай бұрын
@@chinyuandrew7973 generally water bath heats up water above room temperature.
@Tsuuyoka Ай бұрын
But the HCL is in excess...so why do we use burette to measure. Why can't we use measuring cylinder?
@yez276 Ай бұрын
As the acid is very concentrated and you are adding it throughout the experiment (if conc safer in burette)
@Tsuuyoka Ай бұрын
For qs 4 part(a)(ii), why do we use the 0.02 instead of the conc fromthe previous question?
@Tsuuyoka Ай бұрын
For qs 2(a)(iii), I am a bit confused why the answer is not constant, and explanation is overall 2nd order, could u elaborate more on why?
@good-b1c Ай бұрын
Life saver
@Tsuuyoka Ай бұрын
For the last, part(e), is it acceptable to write use smaller volume ?? Pls reply 😊
@CamScience Ай бұрын
@@Tsuuyoka i prefer concentration as decreasing volume increases %error
@Tsuuyoka Ай бұрын
@@CamScience ohh I see
@Tsuuyoka 16 күн бұрын
For qs 2(b)(ii), isn't it we have to find the temperature change every fixed intervals so can calculate mean? Can we actually use initial temperature and final temperature together and divide by 2 to obtain a mean?
@CamScience 16 күн бұрын
@@Tsuuyoka i feel initial and final temperature does not exactly explain the time of temperature measurement. We need to specify
@Tsuuyoka Ай бұрын
For the part (g)(ii), why do we have to subtract the result of distilled water from the result of dissolved oxygen in river water?
@CamScience Ай бұрын
@@Tsuuyoka coz that much oxygen is present even when used distilled water so actual solution contains that many moles of oxygen less tban calculated
@Tsuuyoka Ай бұрын
@@CamScience I don't get it....why tho? Isn't it got oxygen alr in river water? Or is it that the oxygen concentration in river water is not accurate?
@CamScience Ай бұрын
@@Tsuuyoka we want to calculate oxygen present in river water, but what we subtracted is the oxygen prrsent in other solutions used for experiment so need to subtract it
@Tsuuyoka Ай бұрын
@@CamScience you mean the river water inside contain other solutions hence we subtract the value for distilled water from the previous concentration given in part (f)?
@CamScience Ай бұрын
@@Tsuuyoka no it means the solutions used for experiment contains dissolved oxygen like KI, sulfuric acid, sodium thiosulfate
@nandinirohitmakwana806 Ай бұрын
Thanku❤
@Biryani65 Ай бұрын
ty great video i actually did this paper in my but i didnt get good marks so now oct nove do you have any tips for paper on 11th oct
@CamScience Ай бұрын
Tips to write paper 5 kzbin.info/www/bejne/e3PScquVm9agrbc
@devluharuwalla1943 Ай бұрын
gradient is calculated wrong?
@CamScience Ай бұрын
@@devluharuwalla1943 no its correct
@alviahasan6 Ай бұрын
But I have 2580 is it correct?
@noku06 Ай бұрын
@@alviahasan6 Isn't the gradient different for us all since our graphs aren't identical? (My gradient is 2520)
@delademandrewdunyoh2706 22 күн бұрын
It is correct, the mark scheme awards the mark for the gradient based on the coordinates you picked.
@SimbaMukundwa Ай бұрын
Thank you so much
@Tsuuyoka Ай бұрын
Why do we use dilute sulfuric acid? We add it and test for what exactly?
@CamScience Ай бұрын
@@Tsuuyoka we can use sulfuric acid to check the presence of Ba2+ or viceversa
@Tsuuyoka Ай бұрын
For qs 1(h)(iii), the mole of AgN03 which is 0.062507357....butbwhy do we need to find 5.60×10^-3 again?
@kundaitheperson Ай бұрын
That is the number of moles of AgNO3 which we have in the 250cm3 we made so now we need to find how many moles of AgNO3 reacted with Cl- ions so we can find the number of moles of Cl- which will be 0.0224/0.25x0.0625….. to get 5.60x10^-3
@Tsuuyoka Ай бұрын
@@kundaitheperson ohhhh I see...thank you so much ❤️❤️
@Tsuuyoka Ай бұрын
How about for Q's 2c(iv), how come we can still include the reading even if it is taken at 13 minutes? The explanation felt a little lacking for my understanding
@jamwhdjwjdj9837 29 күн бұрын
@@TsuuyokaIf u look at the time, it states 1,13,20,30, it didnt fit the trend, so it would be better to follow the trend 1,10,20,30,40 which gives more accurate and corresponds to time
@GHOST_SCRIPT Ай бұрын
Thanks so much
@GHOST_SCRIPT Ай бұрын
Litrally what i was looking for
@sujanlimbu5431 2 ай бұрын
free acees to mind map in description ??
@CamScience 2 ай бұрын
@@sujanlimbu5431 t.me/camscience2
@CamScience 2 ай бұрын
@@sujanlimbu5431 t.me/camscience2
@sujanlimbu5431 2 ай бұрын
@@CamScience thank you
@Alevel_Physics 2 ай бұрын
Amazing thank you very much, well explained ❤
@lyricalway2005 2 ай бұрын
The link doestnot have the mind maos
@CamScience 2 ай бұрын
@@lyricalway2005 here is the link. But u should have telegram messenger t.me/camscience2/455 Or go to my telegram channel camscience2 and search mind maps u will get it.
@KPGAMING-xc8qf 2 ай бұрын
1:51 1:52 1:52 1:53 1:53 1:53 1:53 1:54 1:54 1:54 1:54 1:55 1:55 1:55 1:55 1:55 1:56 1:56 1:56 1:56 1:56 1:57 1:57 1:57 1:57 1:57 1:58 1:58 1:58 1:58 1:58 1:58 1:59 1:59 1:59 1:59
@KPGAMING-xc8qf 2 ай бұрын
Good
@Kishaarrrrrrr 2 ай бұрын
Thank you so much
@muhammadfaheem5213 3 ай бұрын
New sub at ur service
@SanaAli-q4d 4 ай бұрын
Pl give reference to markowknif rule when you are explaining major product
@sheharyarraheel2494 5 ай бұрын
Watching it before 30 minutes in exam
@CamScience 5 ай бұрын
All the best
@sheharyarraheel2494 5 ай бұрын
@@CamScience thank you
@arshadulhaqueahnaf7882 14 күн бұрын
Good
@boyishood 5 ай бұрын
🔴🔴
@aashoukry 5 ай бұрын
Hi ma'am I did may june 2024 chem paper and there was same question as 2h) and I wrote to mix reaction instead of to mix solution will I still get the mark
@CamScience 5 ай бұрын
I think it should be marked correct but its better if u had written mixing reactants
@wait9959 5 ай бұрын
If i am doing a test,how do i know in which test i am suppose to use litmus paper.
@CamScience 5 ай бұрын
Whenever a gas evolves on heating
@priyanshirastogi228 5 ай бұрын
video was helpful thank you ma'am
@iuv7203 5 ай бұрын
for 1b we added 10 cm^3 of h2O to the ethoxyethane layer so why isn't the total volume 20cm^3?
@USER2000-ng1pz 5 ай бұрын
exactly i was confused as well in this
@ashtonmiller1186 5 ай бұрын
@@USER2000-ng1pz bcz we need conc of acid, for which we do mol/vol of acid, acid comes out of ethoxyethane and is ONLY in10cm3 of that extra water added, so H+ ions arent present anymore in 10cm3 of ethoxyethane
@CamScience 5 ай бұрын
mass of solute calculated was for 10cm3 of ethoxy only. So to calculate concentration of ethoxyethane actual vomume of ethkxyethane should be used
@iuv7203 5 ай бұрын
@@CamScience tyyy
@mahnoorhadi9306 5 ай бұрын
thanku ma'am this was very helpful 9 hours before my caie
@shreysomani359 5 ай бұрын
Why have you drawn a curve of best fit shouldn't it be line?
@CamScience 5 ай бұрын
Coz the points clearly show its a curve and not a straight line. Also always remember for rate of reaction graph of change in reactants/products Vs time is always a curve
@Heisrey 5 ай бұрын
thank you so much i literally have exams in about 1 hour and this helped alot much loveeeeeee❤❤❤❤
@ranabaka 5 ай бұрын
I really appreciate this video, ty