Inorganic Chemistry

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Joined: 6 Jan 2008
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24 Jan 2008 12:13:57 IST
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why do we use con.HCl for the flame test of Inorganic salts? plz answer...
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Ashwin R's Avatar

Blazing goIITian

Joined: 27 Dec 2007
Posts: 324
24 Jan 2008 14:04:41 IST
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HCl ionises the salt.........
you know only basic radicals give result to flame test.....
so it is neccessary to introduce only the basic radicals to flame....

for example
CaSO4 ionises to Ca2+ and SO4 2-
inthis way calcium radical is introduced....
rate me if you underrstood or nudge me i will try to give you a detailed info....
The Sniper's Avatar

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24 Jan 2008 14:22:42 IST
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conc HCl is used to convert the salts to chlorides bcoz the chlorides are more volatile.Hence they give better flame tests.

~ The Sniper
Tarin Bansal's Avatar

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24 Jan 2008 23:29:37 IST
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Conc HCl breaks the salt in its ions and this helps in giving flame test.
Flame test is given when the electron is excited in the presence of a source of energy(flame here) and when U break the salt in its ions with conc HCl, the free electrons are available more easily and hence it can give flame test.
Sairam's Avatar

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25 Jan 2008 19:23:34 IST
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Sniper's reason is perfect
saurabh panda's Avatar

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Joined: 14 Dec 2006
Posts: 55
29 Jan 2008 12:30:01 IST
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plz. ask this to forum expert
becos i think tarinbansal is right and also sniper.
also hcl  is  used to thoroughly clean the nichrome wire

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