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Author Topic: Chemistry Help HERE ONLY !!  (Read 107728 times)

zara

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Re: Chemistry Help HERE ONLY !!
« Reply #225 on: May 29, 2009, 05:17:28 am »
yea its rite...but remove the evaporation part...dats rong..
heat to crystallisation pt..allow to cool..filter..wash n dry...
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Offline ZeroZero82

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Re: Chemistry Help HERE ONLY !!
« Reply #226 on: May 29, 2009, 10:06:37 am »
Heat until crystallisation point. Cool 'til crystals appear, then dry. ;D

Can anyone tell me what is modern proccess?
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Offline unknown 101

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Re: Chemistry Help HERE ONLY !!
« Reply #227 on: May 29, 2009, 10:28:42 am »
Quote from: ZeroZero82 on May 29, 2009, 10:06:37 am
Heat until crystallisation point. Cool 'til crystals appear, then dry. ;D

Can anyone tell me what is modern proccess?

modern process for wat?
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Offline ZeroZero82

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Re: Chemistry Help HERE ONLY !!
« Reply #228 on: May 29, 2009, 10:30:46 am »
Quote from: LilWayne on May 29, 2009, 10:28:42 am
Quote from: ZeroZero82 on May 29, 2009, 10:06:37 am
Heat until crystallisation point. Cool 'til crystals appear, then dry. ;D

Can anyone tell me what is modern proccess?

modern process for wat?
nov.2005 Q7)
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zara

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Re: Chemistry Help HERE ONLY !!
« Reply #229 on: May 29, 2009, 10:31:04 am »
Quote from: ZeroZero82 on May 29, 2009, 10:06:37 am
Heat until crystallisation point. Cool 'til crystals appear, then dry. ;D

Can anyone tell me what is modern proccess?
hey.....ur 4gettin sum points...hv a luk on my post...
filterin n washin with distilled water are vry essential points.....

n wats modern process??
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Offline ZeroZero82

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Re: Chemistry Help HERE ONLY !!
« Reply #230 on: May 29, 2009, 10:34:28 am »
Quote from: zara on May 29, 2009, 10:31:04 am
Quote from: ZeroZero82 on May 29, 2009, 10:06:37 am
Heat until crystallisation point. Cool 'til crystals appear, then dry. ;D

Can anyone tell me what is modern proccess?
hey.....ur 4gettin sum points...hv a luk on my post...
filterin n washin with distilled water are vry essential points.....

n wats modern process??

yea you're right i forget them :P

there's a question in nov.2005 Q7) about modern process  ???
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Offline unknown 101

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Re: Chemistry Help HERE ONLY !!
« Reply #231 on: May 29, 2009, 10:36:26 am »
Quote from: ZeroZero82 on May 29, 2009, 10:30:46 am
Quote from: LilWayne on May 29, 2009, 10:28:42 am
Quote from: ZeroZero82 on May 29, 2009, 10:06:37 am
Heat until crystallisation point. Cool 'til crystals appear, then dry. ;D

Can anyone tell me what is modern proccess?

modern process for wat?
nov.2005 Q7)


7)a) reacting hydrocarbons with steam, or electrolysis of brine ( any one of the 2)
b)i) iron
ii)because lower temp would shft equiliberium to the right (cuz forward reaction is exo) in order to increase temp thus increasing yeild
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Offline unknown 101

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Re: Chemistry Help HERE ONLY !!
« Reply #232 on: May 29, 2009, 10:38:45 am »
ohh sh*t, i thought u wanted the answers, lool,
 the modern process:
catalyst iron
ATM of 250
temp of about 450

« Last Edit: May 29, 2009, 10:41:13 am by LilWayne »
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Offline ZeroZero82

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Re: Chemistry Help HERE ONLY !!
« Reply #233 on: May 29, 2009, 10:41:04 am »
N2 + 3H2 <--> 2NH3      this is the habor process?

modern process is used to obtain what?
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Offline unknown 101

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Re: Chemistry Help HERE ONLY !!
« Reply #234 on: May 29, 2009, 10:42:58 am »
Quote from: ZeroZero82 on May 29, 2009, 10:41:04 am
N2 + 3H2 <--> 2NH3      this is the habor process?

modern process is used to obtain what?


its also used to obtain ammonia, the old haber process in nov05 Q7 uses different conditions than the new way
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Offline ZeroZero82

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Re: Chemistry Help HERE ONLY !!
« Reply #235 on: May 29, 2009, 10:45:23 am »
Thanks ;D
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Offline unknown 101

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Re: Chemistry Help HERE ONLY !!
« Reply #236 on: May 29, 2009, 10:51:06 am »
Quote from: ZeroZero82 on May 29, 2009, 10:45:23 am
Thanks ;D

ur welcome ;)

i have a question, lets see if anyone can answer it

Why is ammonia stored as a liquid under pressure?
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Offline jkiam11

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Re: Chemistry Help HERE ONLY !!
« Reply #237 on: May 29, 2009, 10:52:42 am »
is it because if it's stored under low pressure it will turn into nitrogen and hydrogen?
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Offline ZeroZero82

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Re: Chemistry Help HERE ONLY !!
« Reply #238 on: May 29, 2009, 10:55:42 am »
because at low pressure it will change to gas. So we keep it under high pressure so it stays as liquid and have a volume
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Offline unknown 101

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Re: Chemistry Help HERE ONLY !!
« Reply #239 on: May 29, 2009, 10:57:17 am »
Quote from: ZeroZero82 on May 29, 2009, 10:55:42 am
because at low pressure it will change to gas. So we keep it under high pressure so it stays as liquid and have a volume

yeah , and also when it is a liquid its easier to transport
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