Question

name the compound found in draeger so when a person who is being drunk(alcohol) blows air in that it shows green colour..

Answer 1

potassium dichromate (K2Cr2O7) will turn to chromium (III) sulfate (Cr2(SO4)3) when exposed to alcohol. potassium dichromate is yellow-ish, chromium (III) sulfate is green.

Answer 2

uhmm.. can u write the reaction ..

Answer 3

2 Cr2O7 2- + 3 C2H5OH + 16 H+ ---> 4 Cr 3+ +3 C2H4O (acetic acid) + 11 H2O

Answer 4

\[2Cr{_2}O{_7}{^-}{^2} + 3C{_2}H{_5}OH + 16H{^+} \rightarrow 4Cr{^+}{^3} + 11H{_2}O + 3CH{_3}COOH\]

Answer 5

the H+ is sulfuric acid - hence the actual final green chromium product is Cr2(SO4)3 as JFraser stated previously.

Answer 6

thanks Ochy, you beat me to the punch!

Answer 7

hmm.. but guys the name of compound is boric oxide as far i know
that in dreeger boric oxide along with sulphuric acid it is present and when air comes in it contain ethanol and the colour it gives is green
now plz u tell me which is correct ans..??

Answer 8

and the reaction u stated which of them show green colour Cr or ch3cooh???

Answer 9

boric oxide is colorless, as far as I know. Chromium ions (Cr+3) are green when dissolved in water. CH3COOH is acetic acid, and is colorless

Answer 10

but here there is no water how can u say??

Answer 11

there is water, just not shown in the reaction because it only acts as a carrier for the ions

Answer 12

y its oxide is colourless i dont think because beady materials which are attahed to dresses for making it attractive it just a crystalline material but it have colour..

Answer 13

beads made from boric oxides have metal salts added to them to give them color.

Answer 14

well i just google and u wer right what u said but the reason i told it is also correct ...

Answer 15

i m showing u the reaction
H3B03 + C2H5OH + H2SO4--------> (C2H50)3B
blue green compound

Answer 16

Thanks Heena - Thats good to know!

Answer 17

yw sir i m just trying to relate chemistry with our daily life..