pH-Spectrum of
Magnesium-Copper-Solution

Experimental:

System Cu - (0.5 mmol/L CuCl₂ / dist. water),
System Mg - (0.5 mmol/L MgCl₂ / dist. water),
System (Cu/Mg), System (Cu+Mg) - (0.5 mmol/L CuCl₂ + 0.5 mmol/L MgCl₂ / dist. water)

Results:

Fingerprints

System Cu: The forming of Cu(OH)₂ between pH 6.5 and 7.5 and the forming of Cu(OH)₃^- after pH 11.5 could be shown.
System Mg: The forming of Mg(OH)₂ between pH 11.5 and 12.0 could be shown.
System (Cu/Mg): The forming of Cu(OH)₂ between pH 6.5 and 7.5 and Mg(OH)₂ between pH 11.5 and 12.0 could be shown.

Systemprint

System (Cu+Mg): The forming of the [Cu(OH)₃Mg]⁺-complex (in-situ) at pH 11.5 and the forming of the
[Cu(OH)₃Mg(OH)]-complex (in-situ) at pH 11.8, before the rearrangement to Mg(OH)₂ begins.