hi sir I have a question and im pretty bad at chemistry so forgive me if its obvious however for the structure in question 15 why can't there be a hydrogen under where the C=O is ? also great vid
Hi. There can't be an H attached to that carbon (no2 in my diagram) because it's already forming 4 bonds (2 bonds to the oxygen, one to carbon no 1 and one to carbon no 3). That's the problem with using skeletal formula at first- if you had drawn out the formula in displayed form it would be more obvious- you will get used to skeletal formulae with practise but they can be a bit confusing at first.
Hi I think you made a mistake on question 13. If the forwards direction is exothermic, wouldn't you want to decrease the temperature to move the equilibrium position to the right?
![OCR A-Level Chemistry A June 2022 Paper 1 [Walkthrough and Tutorial]](http://i.ytimg.com/vi/HtjMWxBMVqU/mqdefault.jpg)
these past paper walkthroughs have really helped me so thank you 👊
Thanks for watching. Best of luck with yourvexams:-)
think u missed question 18 however very helpful video as i can see your thought process and approach to these questions so thank u
Thank you :-)
Why is delta H constant in question 11?
why do you skip so many questions
hi sir I have a question and im pretty bad at chemistry so forgive me if its obvious however for the structure in question 15 why can't there be a hydrogen under where the C=O is ?
also great vid
Hi. There can't be an H attached to that carbon (no2 in my diagram) because it's already forming 4 bonds (2 bonds to the oxygen, one to carbon no 1 and one to carbon no 3). That's the problem with using skeletal formula at first- if you had drawn out the formula in displayed form it would be more obvious- you will get used to skeletal formulae with practise but they can be a bit confusing at first.
@@daviesa-levelchemistry1210 thank you so much sir
Hi I think you made a mistake on question 13. If the forwards direction is exothermic, wouldn't you want to decrease the temperature to move the equilibrium position to the right?
he corrected it in the video