Thanks alot sir, I'd give you the nobel prize if I had one.

@sarahkekeli

2 жыл бұрын

Hello

@HemZi123

2 жыл бұрын

@@sarahkekeli hi

@sarahkekeli

2 жыл бұрын

@@HemZi123 any questions (examples) aside the ones he thought? Even a video

@HemZi123

2 жыл бұрын

@@sarahkekeli sorry i can't even remember how to do these its been a long time

@HemZi123

2 жыл бұрын

@@JC-ij4kf almost finished :)

Couldn't be more clear. Awesome clarity in your explanations. Thanks a lot.

Wow, I've struggled with this all year but you've explained it so well that I've got it, thank you so much!

thank youu!! please keep making videos! you're saving my dumb ass haha

@zannatul23

8 жыл бұрын

+Reizel Quiachon trust

All makes sense now, you are the best!

This video is a gem thank you

@MaChemGuy

5 жыл бұрын

Very kind of you to say so :)

Awesome video.

thanks a million, really helpful!!!!!!

Thanks. Great video

Fantastic clarity

here in 2023, and thank you so much i swear you're a lifesaver

wow excellent video

@MaChemGuy

7 жыл бұрын

cutiee pie Thanks!

Thanks boss man

thank you so much

Would this be correct?NO2+NO2->NO+NO+O2 O2+CO+NO->CO2+NO2 overall: NO2+CO->CO2+NO

You make hard concepts easy

which method is better?

you are a legend... 2020

@MaChemGuy

4 жыл бұрын

Harvey Lloyd-Williams I’ll take that. Thanks, very kind.

Thanks

thank you for these videos! would this be correct? RDS- NO + NO ==> N2 + O2 OTHER - N2 + 2O2 ==> 2NO2 ?

@JimJam-ju6vn

2 жыл бұрын

i got that, i wonder if it was correct

in my answer, do i cancel out too or do i have to leave them in for the examiner?

bless u

I don't what is a rate determining step and how to figure it out

Ok, so I've got r = k[NO2]^2, and the net equation is: 3NO2+O2 --> N2 + NO + 3.5O2. "Propose a mechanism for this reaction" Finding this example really hard, any chance you could shed some light on it?

@MaChemGuy

8 жыл бұрын

See my Twitter page. Two followers have answered it for you

@Wallow28

8 жыл бұрын

+MaChemGuy This is my go as I don't have twitter. NO2 + NO2 > NO3 + NO NO3 + 2O2 > 0.5N2 + 3.5O2 0.5N2 + NO2 > N2 + O2 Cancelling out gives the overall equation of 3NO2 + O2 > N2 + 3.5O2 + NO Out of interest, how difficult would you say this question is compared to the average past paper question of its kind?

Would it be fine to write the N in the last mechanism as 1/2N_2?

@MaChemGuy

3 жыл бұрын

That would be OK

Why cant the rate determining step be just 2NO2 rather than NO2 + NO2

MaChemGuy Sir please respond, can I have 1/2 N2 instead of just N? Thank you for doing these videos.

@thejibbos

9 жыл бұрын

Yes, it's the same thing. Good luck for tomorrow.

@flowerpower487

9 жыл бұрын

thejibbos Thanks brah, same to you of course, and thanks for clearing it up. :) btw MaChemGuy is a king for doing this!

@thejibbos

9 жыл бұрын

Yeah he is the true MVP. How did you find the exam?

@flowerpower487

9 жыл бұрын

thejibbos Easier paper than normal imo. Got one exam left. wabu?

@thejibbos

9 жыл бұрын

I finished yesterday with f215. I thought this exam was 'easy' but it did have a lot of tricks in it.

for the RDS for the 1st one, cant you have NO2+NO2---> N204 instead of NO + NO3?

@MaChemGuy

5 жыл бұрын

JitteryRobin990 Yes as long as you cancel it in step 2

@akifrahman

5 жыл бұрын

@@MaChemGuy Thank you sir.

sorry, just got a question in the first question example you said that the numbers present behind the reactant determine there order in the rate=k() however in the example of no2 you wrote second order whereas in the overall equation it is 1? can you please explain this to me? any one can answer!!!!! thanks

@MaChemGuy

3 жыл бұрын

The order tells you the number of molecules involved in the RDS not the overall reaction equation.

@tahahussain5439

3 жыл бұрын

@@MaChemGuy cool thank you very much and I love you videos sir keep up with the good work

for the last why cant i have 2NO --> N2 + O2 & 2O2 + N2 --> 2NO2 ?

@amirahrafique9408

8 жыл бұрын

That's what I did too!

@user-fn3up7rg6o

5 жыл бұрын

Me three!

@talhabashir873

Жыл бұрын

Me 4

@belindamary7816

Жыл бұрын

Me 5?

can you write 2NO2 instead of two separate NO2

@MaChemGuy

5 ай бұрын

That’s fine 👍

how come in the rate equations vid you said the coefficient isn't determined by the order but here it is

@MaChemGuy

4 жыл бұрын

pirlo garcia You’re mixing up the overall equation with the rate determining step equation.

How do you know what the RDS is?

@MaChemGuy

8 жыл бұрын

It's the slowest step and contains the chemicals that appear in the rate equation (nb if order 2 there will be 2 moles of them etc)

@Fienemien99

8 жыл бұрын

I realised that, but what if the rate isn't given? Than how can you tell which concentration (of which molecule) determines the speed of the reaction? Or is the rate always given?

@MaChemGuy

8 жыл бұрын

+Josefien Berg Never seen that before at A level

@Blaze-ls3zw

7 жыл бұрын

Josefien Berg I'm pretty sure the rate has to be given in a question, because rate can only be worked out through experimental data. It can't just be worked out theoretically. So you'll always have some rate measurements to start with, and then from that you can work out order, rate equation and etc...

Who's watching in 2019

bro can you come to his

@khalidsamer2991

2 жыл бұрын

EIS* (my school)