Safa Ezzine

3 Questions 4 Answers 0 Followers

Questions related from Safa Ezzine

Why we must keep the temperature at 10 ° C when crystallizing chromium alum ?

I tried to prepare chromium alum by ox-red reaction between K2Cr2O7 and ethanol in presence of H2SO4. The result is always a green liquid that dont crystallize. I have found that the reaction must...

25 November 2018 10,074 3 View

Is the bump in the beginnig of the diffraction patterns always an amorphous part?

I have always a bump in the diffraction patterns. The majority of peaks were indexed. The preparation temperature exceeded decomposition temperature of reagents and the melting point were not...

29 November 2014 2,784 9 View

Why can't SEM analysis detect lithium?

Why can SEM detect only elements for Z>5 ?

26 November 2014 1,899 13 View