Rates of reaction | GCSE | Question Walkthrough

C6. Rates of Reaction
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GCSE Chemistry Question walkthrough.
In this video I go through a number of GCSE Questions and discuss the science behind each question.
I will help you work on your exam technique and make sure I model my thoughts as well as making clear what you need to write to get all of the marks.
We look at 4 GCSE chemistry questions about Rates of Reactions, based around graphs.

[@sx4fa]

this is so helpful!!! please continue to do question walk throughs. thank you so much.

[@chemistrytutor]

Several more coming in the next week!

[@sx4fa]

@@chemistrytutor yay thank you!! really looking forward to them

[@smashgcse1788]

Thank you so much for this video!! + I have a question------> now if the concentration is increased the rate of reaction increase as there will be more frequent collisions and so a steeper slope. Does increasing the concentration also means that the graph will level off at a higher height as the amount of reactants increased? so the graph will have a higher height and steeper gradient

[@chemistrytutor]

Assuming that both graphs use the same volume then yes, the higher concentration also makes more product and will be higher. We can even say it is proportional: 20cm3 volume and 4 mol/dm3 concentration will make twice as much gas (or product generally) compated to 20cm3 volume and 2 mol/dm3 concentration

[@marigeo24]

@@chemistrytutor so if the volume decreases and the concentration increases by proportional amounts, then the product amount remains the same?

[@chemistrytutor]

@@marigeo24 that's correct yes. Volume is halved but Concentration is doubled, would lead to increased rate (steeper gradient) but same amount (and height) of product

[@saraezaldeen9400]

Your videos are very helpful. Thank you so much. Are you going to make more videos for A level chemistry?

[@chemistrytutor]

Thank you, and yes. Going to do more from July I think 😁

[@annsurya7411]

Thank you very much sir you are the best

[@Jojo-sd7yo]

<a href="#" class="seekto" data-time="618">10:18</a> I answered that the greater the concentration, the faster the rate of reaction and so as the reaction progresses more gas is produced meaning that it causes the solution to be cloudy. Is this correct? I was thinking this was to do with concentration and how is affects rate of reaction

[@chemistrytutor]

No, I'm afraid it's not correct. The cloudiness is to do with the production of the precipitate. You wouldn't describe something as cloudy if it made bubbles. Cloudiness is to do with making a white coloured solid

[@thomasscott6892]

Hi. Quick question if the entry requiremnt for biology is a 6 and i got a 5 do you think they would let me into sixth form. Great vid.

[@chemistrytutor]

Thank you 😊 Couldn't say for sure about your question, sorry! Good luck for Chemistry!

[@tomshuter5248]

Cheers bro got last ever chemistry test tmrw! :)

[@chemistrytutor]

Good luck!

[@tomshuter5248]

@@chemistrytutor thank you!

[@Ok-up7ty]

@@tomshuter5248 How did it goo!!

[@tomshuter5248]

@@Ok-up7ty got a grade 8 😁, hope you have a great day!!

[@ahzsquad8481]

@@tomshuter5248 that's so good!! What type of revision did you do like past paper or just notes?

[@ferrelchintoh3346]

Thank you so Much i really enjoyed And i understood keep it up...🔥🔥

[@chemistrytutor]

Thanks for the feedback. Much appreciated 🙏

[@milkahcyles4561]

I have an exam tomorrow Thank you

[@chemistrytutor]

You're welcome! And good luck!

[@artisticcookie9266]

You are so underrated 😥

[@chemistrytutor]

Thank you loads! Much appreciated

[@user-yg8xt7dm3g]

thank you so much

[@chemistrytutor]

😃

[@yunusali4947]

Mate have u done any inorganic chemistry year 1 content

[@chemistrytutor]

I haven't yet, but its on my list. I need to finish off a few last bits of year 1

[@gorgeousss9014]

Is this higher ?

[@chemistrytutor]

I'd say this is both higher and foundation. So top end of Foundation - one of the later questions on a Foundation paper, or an early question on a Higher paper

[@gorgeousss9014]

@@chemistrytutor okay thankyouuu

[@laibanadeem7811]

Is this foundation paper or higher?

[@chemistrytutor]

I'd say this is both higher and foundation. So top end of Foundation - one of the later questions on a Foundation paper, or an early question on a Higher paper

[@kiana8228]

<a href="#" class="seekto" data-time="165">2:45</a> don’t we change the cm^3 to dm^3 ???

[@chemistrytutor]

That's only essential for moles of solution calculations (e.g. titrations). You can do it here, but unnecessary. When you are quoting a rate of reaction you just need to keep track of what is changing and divide that by how long it took for the change. 😃

[@annsurya7411]

Sir I am a university student Lecturers don't teach to your understanding Please can you be my teacher

[@chemistrytutor]

That is a really lovely thing to say! There are definitely some great lecturers out there though... hang in there!

[@ranaranon3700]

Thank you alot

[@chemistrytutor]

Glad it was useful 👍