Відео

@@SuriaDana-r4y there's no predictions but transition elements have good weightage, also few numericals are for sure like the one from entropy. Also few organic questions from benzene and NMR are also for sure

@@CamScience thank u so much maam

@@ibrahimmasood1104 coz when OH is present with benzene we consider phenol as main functional group and remaining groups are counted as substituents.

@ridzs in step 6 its written that all content in conical flask

Thanks for the appreciation!

We need to see total number of protons on adjacent carbon. So the CH group have 3+3+2 protons. Not 2

@@suhaibatique9625 0620 papers are also solved

I am having problems related to atp paper... your solutions are best to understand than other available material in the UA-cam

With H2SO4 is test 4 which is separate from NaOH which is test 3. So u can say that separate reagents were added in separate test tubes. They are not continued tests

@@MugaggaShafik-w5i it is the general method to put the aqueous concentration in denominator. But if its mentioned in question tk calculate otherway it can also be done. At times both the answers are accepted

@@chenquillpen no u can't as its clearly stated that experiment is done with distilled water and then how will use the value obtained to improve the error

@CamScience oops i didnt read it properly

@@Beautifulday1231r practical tips are there for ur reference

@@Beautifulday1231r partition coefficient and acid base Equilibria is also there but buffers yes can be added

@@CamScience Thank you so much for your hard work! Could you make a video about hess law, entropy as well

@@Tsuuyoka coz the volume is measured just ones. No initial volume measured

@@MohamedFariq-zo1cv second order if half life increases

@@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 ?

@@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.

@@alvinamone4235 41 will be coming today

@@litask9773 all the best

the mole of cao used look in step one ....the same mole is used for experiment two

@@Leo.tae17 but mole ratio of CaO to HCl is 1:2? so shouldnt it be 0.05 x 2 = 0.1mol? I might be wrong

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

Are you writing on Friday also?

Yes she missed it

@@idkname007 as moles of hydrated and anhydrous salt remains same and we have calculated mass of hydrated salt to be weighed

@@richierichard7 they may mark u for such answers but it is prefered to use 3sf

@@chinyuandrew7973 generally water bath heats up water above room temperature.

As the acid is very concentrated and you are adding it throughout the experiment (if conc safer in burette)

@@Tsuuyoka i prefer concentration as decreasing volume increases %error

@@CamScience ohh I see

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?

@@Tsuuyoka i feel initial and final temperature does not exactly explain the time of temperature measurement. We need to specify

@@Tsuuyoka coz that much oxygen is present even when used distilled water so actual solution contains that many moles of oxygen less tban calculated

@@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?

@@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

@@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)?

@@Tsuuyoka no it means the solutions used for experiment contains dissolved oxygen like KI, sulfuric acid, sodium thiosulfate

Tips to write paper 5 ua-cam.com/video/EBoAx_fqmwU/v-deo.html

@@devluharuwalla1943 no its correct

But I have 2580 is it correct?

@@alviahasan6 Isn't the gradient different for us all since our graphs aren't identical? (My gradient is 2520)

It is correct, the mark scheme awards the mark for the gradient based on the coordinates you picked.

@@Tsuuyoka we can use sulfuric acid to check the presence of Ba2+ or viceversa

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

@@kundaiwithagee ohhhh I see...thank you so much ❤️❤️

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

@@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

@@sujanlimbu5431 t.me/camscience2

@@sujanlimbu5431 t.me/camscience2

@@CamScience thank you