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...

11 November 2018 3,768 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...

11 November 2014 8,086 10 View

Why can't SEM analysis detect lithium?

Why can SEM detect only elements for Z>5 ?

11 November 2014 4,904 14 View