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Author Topic: Chemistry Urgent  (Read 2766 times)

Offline Zain-Xa

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Chemistry Urgent
« on: June 09, 2009, 04:11:01 pm »
guyz in p1 o/n 2006 q19

could any1 explain the question ????

the answer in the markscheme is B


Thanks in adv.  :)
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Offline Ghost Of Highbury

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Re: Chemistry Urgent
« Reply #1 on: June 09, 2009, 04:14:06 pm »
crystallisation will obtain the crystals of the compunds but there will still be a little liquid mixed

therefore u have to filter it
 :)

nid404 can add on to that..nid u dere??
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nid404

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Re: Chemistry Urgent
« Reply #2 on: June 09, 2009, 04:15:35 pm »
Quote from: zainy on June 09, 2009, 04:11:01 pm
guyz in p1 o/n 2006 q19

could any1 explain the question ????

the answer in the markscheme is B


Thanks in adv.  :)

It's B because the barium sulphate is insoluble and needs to be filtered, whereas barium chloride is soluble and needs to be obtained by crystallisation
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Offline Zain-Xa

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Re: Chemistry Urgent
« Reply #3 on: June 09, 2009, 04:16:09 pm »
Thanks guyz +rep  :)
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Offline Ghost Of Highbury

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Re: Chemistry Urgent
« Reply #4 on: June 09, 2009, 04:16:43 pm »
nid +rep to u too

50!!! (second time)
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nid404

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Re: Chemistry Urgent
« Reply #5 on: June 09, 2009, 04:20:14 pm »
Quote from: eddie_adi619 on June 09, 2009, 04:16:43 pm
nid +rep to u too

50!!! (second time)

no use.....now i really can't help it but say i don't care...it keeps falling
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Offline Zain-Xa

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Re: Chemistry Urgent
« Reply #6 on: June 09, 2009, 05:57:37 pm »
heey again does any1 know any gd sites 2 practice chem multiple chice question ???
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Offline Zain-Xa

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Re: Chemistry Urgent
« Reply #7 on: June 09, 2009, 06:07:07 pm »
Quote from: zainy on June 09, 2009, 05:57:37 pm
heey again does any1 know any gd sites 2 practice chem multiple chice question ???

guyz answer plssss  :(
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Offline Bassiouni

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Re: Chemistry Urgent
« Reply #8 on: June 09, 2009, 06:46:33 pm »
Yh Past Papers :D

IF your country is Supporting IGCSE as well as Egypt is :p You should find Bookshops for IGCSE Like her in Egypt we have Loads and all are official
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Offline Zain-Xa

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Re: Chemistry Urgent
« Reply #9 on: June 11, 2009, 05:21:01 pm »
need help agai n !!?

q 3 in m/j 07 i dnt get it ???
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Offline sweetsh

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Re: Chemistry Urgent
« Reply #10 on: June 11, 2009, 05:25:19 pm »
This is a thermometer...He is askin gyou what could be the temprature...The point on the left might be 70/80/100 and the point on the left can be 80/90/110 right? So you count to see which is the more reliable answer so it's 75.5 as the point on the right will be 70 and  on the left 80
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Offline Zain-Xa

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Re: Chemistry Urgent
« Reply #11 on: June 11, 2009, 05:29:06 pm »
ohhkk i sort of get thnk u  :)
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Offline sweetsh

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Re: Chemistry Urgent
« Reply #12 on: June 11, 2009, 05:30:13 pm »
Try to do it, did you get it?
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Offline Zain-Xa

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Re: Chemistry Urgent
« Reply #13 on: June 11, 2009, 05:44:23 pm »
ya i did do it but umm hw do u know wether its 105.5 or 85.5  ???

the rest i gt !
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What can I do, to make it right
Falling so hard so fast this time
What did I say, what did you do?
How did I fall in love with you?


zzzzzZZZZZZzzzzzzzzz

I'll be strong.. I'll be wrong.. all the love goes on.. Oh im just a girl tryna find a place in this worLD..  Taylor swift <3

....

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Re: Chemistry Urgent
« Reply #14 on: June 11, 2009, 05:45:48 pm »
Quote from: zainy on June 11, 2009, 05:44:23 pm
ya i did do it but umm hw do u know wether its 105.5 or 85.5  ???

the rest i gt !
Boiling point is less than that of water. Water boils at 100, so the reading is surely less than 100.
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