IGCSE CHEMISTRY SOLVED past paper 0620/61/M/J/22 - May/June 2022 Paper 61

[@bibaban2202]

Thanks a lot for your clear presentation of the curves, they helped me a lot.

[@elshazlya99]

thank you sooooo much you don't how much you're helping im sooo scared for m/j session this year inshallah it'lll be easy thank you loaddss

[@eskathegoat2137]

God bless you,please keep uplaoding

[@mohammedsiddiqui2763]

For question 1c, can we not use a cobalt chloride paper? Question didn't say to test whether the water is pure or impure, rather to show it is water, so essentialy the presence of water. Please reply, because I might be wrong. Thanks.

[@DrMonaSeif]

The question did Not ask to prove the presence of water, what the question however asked for was a test to identify that the liquid in the U-tube is water and Not something else. And.... liquids can be identified and differentiated by their varying boiling point.

[@zuhaalishannn]

at 6:16 why are the graphs not leveled? as if they are the same reaction then the same amount of product would be formed, right?

[@DrMonaSeif]

Because the volume of the gas collected in experiment 2 did not reach a plateau yet, and the last two values are (62,65).

[@eng2577]

for question 2d isnt it the question mention after 50 seconds?

[@VeraAlsous]

Should we learn the tests in question 3 ?

[@YazanAlFaouri222]

They are already given in the exam paper

[@Lala_737]

جزاك الله خير

[@RabiaAli-cx3zu]

I don't understand how you did the cross-multiplication part in question 4

[@laughingatyourn]

me too im so confused

[@DrMonaSeif]

You have the volume of the sample and the mass of the solid in this volume, so let's suppose you have 10 cm³ of the sample and you get the mass of solid in 10 cm3 . so you can make cross multiplication to get the amount of solid in one dm3 all you have to do is to change the volume of the sample into Dm3 by dividing by 1000 then you make cross multiplication

[@oof675]

why is the mass multiplied by 1000?

[@duke.3976]

I’m thinking about that too 💀

[@MahmoudAhmed-lm3nr]

thanks doc

[@abr8749]

In q2e) is it okay to write HCl acid c is more concentrated the hcl acid d because hcl acid c produced more gas?? it would help if you answered thanks 🤍

[@drairylyrics2009]

yes it will , because gas is produced more where the reaction is always faster