salt roschelllls ............>>>>..flgz

wat do u mean y
fehlin's solution is an equimolar mix of fehlin A and fehlin B solution werin
fehlinA is : cupric sulphate
B:sodium potassium tartarate (roschell salt)
itz used 2 distnquish betwn aldehydes and ketones ketones dnt rxt wid it b aldehyde does ...and gives a red ppt of cuporous oxide

wa xactly it does
a decolrs cu2+ ions
b decolorz soln
c prevent precipn of cu2+
d ~~~~~~~~~~~~~1+

i dono ans
>>>>>>>>>>

wen aldehyde is added it converts Cu(2+) blue colour into Cu(2+) red ppt

i dnt knw more chollie

waaaaaaaa
Cu(2+) blue colour into Cu(2+)
u mean 1 to 2+ or versa vice>>>>

the tartarate ion forms a complex preventing precipitation of some ion .I think it shoulod be Cu+

I verified it in wiki , the tartarate ion prevent sprecipitation of Cu2+
for more check out

http://en.wikipedia.org/wiki/Fehling%27s_solution