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I made the videos more so to give certain tips for questions and how to do them if they don't already understand the mark scheme. but it would be better if I could link the markscheme... Thanks for the feedback ! 😃

Can write separately

@@igcsewithhan so it’s the same format as yours although just 3 paragraphs one for the variables one for the method and one for the repeat the experiment and safety precautions?

@@ArjunRUclips-bd9nf yes u can do that, as long as everything is stated it should be fine. Just method should be written in order

@@igcsewithhan okay tyvm this video helped a lot

Supposedly can, but since potassium permanganate is a stronger oxidising agent it is a safer answer. They didn't accept dichromate as an answer in markscheme though...

just have to remember, transition metals generally have colour

@@igcsewithhan yeah but some are white and some are colorless

@@aaaa-ri8is theres no easy way to determine, but KBr KCl and KI are all colourless when dissolved in water

- Group I *Nitrates* (e.g. Potassium Nitrate) undergo _slight_ thermal decomposition, and only produce a Metal *Nitrite* and O2 gas unlike *Nitrates* of other groups. - Group II *Carbonates* (e.g. Magnesium Carbonate) always undergo thermal decomposition. - Group I *Carbonates* (e.g. Potassium Carbonate) don't decompose because they are particularly stable.

1 is wrong because H-H further reacts with chlorine to produce H-Cl

but, even the reaction of ethane with chlorine can give dichloroethane. in fact, there can be 4 different products in the substitution reaction of methane ; chloromethane, dichloromethane, trichloromethane and tetrachloromethane. I think for ethane there might be 6... but I'm not sure about Ethane

​@@spiderking0038but if dichloro is an answer shouldn't be h-h also be an answer since two H's were substituted?

The reason why 3 is correct is because it didn't specify that the reaction has to be between ethane and chlorine, further substitution can still occur. As for why H-H is not considered a product it is because H-H reacts with the chlorine to become H-Cl.

alr thnx guys

they didnt specify the time and amount of each reactant so the reaction will continue even to form other products like Tetrachloroethane hope that helps

hi, thanks for spotting my mistake! However the answer is the same

excactly i was so dam confused on this question ty :)

@@SamsungUserForSomeReason hehe ofccc!!

u should write what variable u r describing. e.g. the independent variable of the experiment is (insert answer).

This is based on 2024 examination syllabus

Yes u can !

Good! 👍

Technically speaking you could but would be MUCH more difficult. You would have to find a way in order to show that the level of starch is different over time, because iodine test is a yes/no test, no in between. One way that could MAYBE work is taking small samples and using a colorimeter, but personally I think it is way safer to test for reducing sugars.

Good luck for yoyr exam today cause i have the same exam today 😭💀

@@Abdulhadi-ki5bu good luck me too

paragraphs !! Always paragraphs

@@igcsewithhancan we list the variables as bullet points though? or no?

@@kthsetrnl You could, but I would advise against it. For some reason I believe it is much more strict in bio and chem than physics XD. (P.S. I see u are a moa too!)

@@igcsewithhan i see!! thank u so much for ur help, and yes!! didn’t know u were a moa too ^^

Hi, the 0.2 at the end are just the standard error values for titration. It isn't clear enough for the examiner if you just say repeat until obtaining similar results because at what point is it not similar anymore? Hope that helps ❤

@@igcsewithhan great explanation ❤️🙏

no problem !!

LOL I HAD THE EXACT SAME DOUBT JUST NOW BRO 😂😂

Did you figure it out yet?

hello ! Generally when naming u want to put the metal before the non metal, that's usually standard.

@@igcsewithhan ?! It's a covalent compound! It's non-metal non-metal!!

@@khubaibhaseeb1095 oh my days, that completely flew over my head ! sorry about that, but in a non-metal non-metal scenario they don't cover why S is before F when writing the compound out in the IG syllabus. If you are curious it has to do with the electropositivity of the elements, but in this scenario my advice would probably just remember most of the time the halogens will be at the back. Sorry again for misunderstanding the question 😅

I'm glad to have helped you !

thanks for the heads up !

hey, I don't think zinc extraction is in the syllabus anymore, but they might link this to another topic/chapter so it can't hurt to learn it as well!

@@igcsewithhan Okay! Thank you sir💞

it is because u used 0.005 instead of 0.0005 ! hope that helps

@@igcsewithhan yes I realized 😭