why is urea added in the determination of copper in brass
Answers
Answered by
0
We do not really need to add the urea for this purpose. There are many ways to carry out the colorimetric analysis. See
Page on http://phs.princetonk12.org/teachers/rcorell/LabColorimetricCuBrass.pdf
and
Page on http://geckkd.ac.in/asc/02_Chemistry_Lab_Manual_for_Students.pdf, page 7 in the pdf.
http://en.wikipedia.org/wiki/Col...
We can use either enzymatic or non-enzymatic methods for making the colour complex for spectroscopic analysis. Urea is used along with the urease enzyme to hydrolyze urea into CO2 and NH3 to make aqueous ammonia solution which will result in formation of [Cu(NH3)4]2+ complex which gives a very strong absorption in visible light. Please read
http://www.chem.missouri.edu/sil...
for a proper explanation of the procedure.
Page on http://phs.princetonk12.org/teachers/rcorell/LabColorimetricCuBrass.pdf
and
Page on http://geckkd.ac.in/asc/02_Chemistry_Lab_Manual_for_Students.pdf, page 7 in the pdf.
http://en.wikipedia.org/wiki/Col...
We can use either enzymatic or non-enzymatic methods for making the colour complex for spectroscopic analysis. Urea is used along with the urease enzyme to hydrolyze urea into CO2 and NH3 to make aqueous ammonia solution which will result in formation of [Cu(NH3)4]2+ complex which gives a very strong absorption in visible light. Please read
http://www.chem.missouri.edu/sil...
for a proper explanation of the procedure.
Similar questions