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Edexcel IAL Chemistry (WCH06/01) Chemistry Laboratory Skills II - 10th May 2016

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Reply 20
Avatar for -Akuma-
-Akuma-
2
Neh, :smile: I'm fine until now. Good luck!

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Original post by -Akuma-
Neh, :smile: I'm fine until now. Good luck!

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Thanks, to you too ☺️


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Reply 22
Avatar for Komol
Komol
2
Is this the unit 6 thread?
Original post by Komol
Is this the unit 6 thread?


All this time I've been thinking its unit 3 🙈



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Original post by Komol
Is this the unit 6 thread?


I think it's for unit 3, no unit 6 information was discussed here

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Reply 25
Avatar for djmans
djmans
2
Original post by Saima Hasnain
All this time I've been thinking its unit 3 🙈



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this is for unit 3
Reply 26
Avatar for AlvlVictim
AlvlVictim
OP
9
Original post by Komol
Is this the unit 6 thread?


Sorry i made a mistake in the heading
Reply 27
Avatar for Elaria
Elaria
1
why dilute ammonia solution is used to test chloride ion and not concentrated ammonia solution after adding AgNO3?
Reply 28
Avatar for AlvlVictim
AlvlVictim
OP
9
Original post by Elaria
why dilute ammonia solution is used to test chloride ion and not concentrated ammonia solution after adding AgNO3?


it already has dissolved in dilute solution so there's no point (oh and to save cost) but for bromine concentrated ammonia solution is used coz it doesnt dissolve in dilute solution :smile:
(edited 7 years ago)
Reply 29
Avatar for djmans
djmans
2
what time do you guys have your exams?
Original post by djmans
what time do you guys have your exams?


at noon tomorrow for me
Reply 31
Avatar for AlvlVictim
AlvlVictim
OP
9
In 3 hours

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(edited 7 years ago)
Reply 32
Avatar for Elaria
Elaria
1
What should be done to make sure that all of the washing soda is transferred to the volumetric flask ?
Transfer the washings too
Regarding the percentage uncertanities, when do we multiply the uncertainity by 2?
Original post by Tayyabshabbirtsr
Regarding the percentage uncertanities, when do we multiply the uncertainity by 2?

when the measuring apparatus is used twice. as in initial and final. eg. thermometer. we take the initial reading and then a final reading. so the error is multiplied by 2
Original post by Tayyabshabbirtsr
Regarding the percentage uncertanities, when do we multiply the uncertainity by 2?

when the measurments are made twice i.e if using burette you measure volume two times but pipitte only once
Original post by djmans
what time do you guys have your exams?

mine is in 4 hours! at 1 pm
Reply 38
Avatar for AlvlVictim
AlvlVictim
OP
9
Can u give an exam acceptable description ?

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Reply 39
Avatar for djmans
djmans
2
how do i do part 3 of the question ?
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