I’m in year 10 and my teacher has not taught me a lesson on this but set us homework-style work for it as ‘home learning’ Does anyone else feel like they’re not learning anything anymore? That’s why I’m here to actually understand the topic :)
We just had sit and listen :( The teacher would occasionally do something cool, but the class could not trusted. Once I made mustard gas by accident because I got distracted....
Just want to thank you for your videos, I've sat the biology exam very confidently after using your videos as revision understanding and being able to answer every question. Now I'm using them for chemistry!
i love this channel, i find this method way better than just sitting down and trying to memorise the information. These videos really help me to answer exam questions, thank you!
As if I have my gcse in a few days, yet Im here trying to cram and in the 5th hou of revising finding more interest in the comments rather than the video itself reeeeee
@@harland8461 i know im late but never revise like that. I know its hard but if you have been studying a while the best thing for a person would be to literally have a break and do something enjoyable to give your brain a break.
Yep, I'm hoping the paper is easy, judging by what came on the biology paper (*cough*boiled carrots*cough*) it doesn't seem like the other papers will have much of the content from the spec, I might as well revise on electrolysis of boiled carrots. I mean, the whole paper was basically based on two practicals and a lot of maths and mitosis.
My year 9 mocks is on friday, so i have a urgent question, why does the sulfuric acid have to be heated and is copper sulfate the key example for the practical, thankyou
Heating the sulfuric acid increases the rate of reaction. Otherwise it would be very slow. This is the example for the practical. But be aware that they don't have to use that example.
Because you're not collecting results or repeating the experiment with different variables, there are no independent, dependant and controlled variables in this practical (they're only for investigations)
its the night before my exams, i have never actually been so anxious before but your videos are actually saving me and have been for a while thank you sirr!
Hi sir, do we place the evaporating basin on a beaker of water when heating simply to balance it or is there another reason as well? Thank you so much for your videos - I have been watching them religiously everyday as it leads up to exams 😂
It's so that we heat it gently. If we placed the evaporating basin directly over the Bunsen burner, we would heat the crystals to too high a temperature. Some crystals would decompose at that temperature. Over the beaker of water, the temperature is too low to cause decomposition.
Just saying, when he says you use evaporation to get crystal from the copper sulfate solution, I think he meant crystallisation instead of evaporation.
1.why do you stop heating the acid gently when it is almost boiling.2.why do we evaporate the filtered solution gently using a water bath .3. Why do we stop heating as soon as crystals are formed
1) If you heat it to a boil and then add the copper oxide the solution could boil over which could be dangerous. 2) You evaporate it gently because if evaporated to quickly (eg bare flame) the crystals will not be as large 3) The whole point of this is to make crystals, so once they have formed there is no reason to continue heating.
1. It's safer. 2. If we heat the evaporating basin directly, it tends to spit, which is dangerous and also we do not want to overheat the crystals otherwise we'd make anhydrous copper sulfate (that also applies to number 3).
