Qualification > Sciences
IG Chemistry Paper 3 discussion
MaNa:
--- Quote from: notty_me on June 02, 2009, 04:15:44 pm ---
--- Quote from: bibo the wa7sh on June 02, 2009, 04:03:35 pm ---heY everYone,
wat about electrolysis of dilute sodium chloride???
Cathode..........
anode..............
and wat happens to the electrolyte???.....
WaiTinG 4 uR RepLies!!xD!!
--- End quote ---
at da cathode it was h2
at anode it was o2
so conc. NaCl was left
--- End quote ---
NOPE its was concentrated NaCl
therefore @ anode Cl would be depsoed no O2
IO4567:
no... im pretty sure it said dilute sodium chloride
esso:
properties of Cao
did it come....cause i think there is diffrent papers
~M.J~:
Guyz...
a bad news
test 4 carboxylic acis is not litmus ppr
the question was to give a test to show that it contains -COOH ions
i searched the net
googled "test 4 carboxylic acid Chemistry" n got the ans.
Test: add water then add sodium hydrogen carbonate
Result: Fizzing and a white ppt. at the bottom
This test is specifically for carboxylic acids and i think they asked this one
not the little litmus paper....... :( :( :(
....:
properties of CaO came in the way, that the ionic structure we had to draw was originally calcium oxide, so we had to tell its properties..
and, about organic acids..i think syllabus specifies that we have to know about ehtanoic acid as a typical weak acid..and so..TYPICAL weak ACID, means, that it reacts in the same way with litmus, metal carbonates, hydroxides, oxides, and even metal themselves as mineral acids..well..when we have to test for an acid, we guys used to use the carbonate test, effervescence occurs, and the gas produced turns limewater milky...what about the rest of you??
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