Qualification > Sciences
CHEMISTRY PAPER 1 HERE
Bani:
please someone answer my previous question and this one too: Q 24 M/J 2007 ???
for Q24, how do we know that chlorine would displace potassium from potassium bromide and iodine won't
Please help...
Thanks in advance
girl_92:
--- Quote from: Bani on June 11, 2009, 05:34:47 pm ---please someone answer my previous question and this one too: Q 24 M/J 2007 ???
for Q24, how do we know that chlorine would displace potassium from potassium bromide and iodine won't
Please help...
Thanks in advance
--- End quote ---
reactivity decreases down the group in grp7
a more reactive halogen displaces a less reactive one 4rm its compound
....:
--- Quote from: Bani on June 11, 2009, 05:34:47 pm ---please someone answer my previous question and this one too: Q 24 M/J 2007 ???
for Q24, how do we know that chlorine would displace potassium from potassium bromide and iodine won't
Please help...
Thanks in advance
--- End quote ---
Chlorine is more reactive than bromine, so it will displace bromine from its compounds. Iodine is less reactive so won't displace bromine.
sweetsh:
According to the halogens..
F
Cl
Br
I
At
So the KBr can react with Cl making a displacement rxn but the Kbr cant react with I because I is less reactive than Br..
So the answer is B
AS girl:
f is the most reactive halogen and so can displace all the others...as u go down reactivity decreases
F
Cl
Br
I
At
so Cl would be able to displace all the halogens which are below them but not above and so on!
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