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14 Terms
Zn 2+
+ NaOh
white ppt
soluble in excess
colourless solution
Zn 2+
NH4OHaq)
white ppt
dissolves in excess → colourless solution
Al 3+
+ NaOH (aq)
white ppt
dissolves in excess → colourless solution
Al 3+
+ NH4OH (aq)
white ppt forms
insoluble in excess
Pb 2+
+ NaOh (aq)
White ppt
dissolves in excess → colourless solution
Pb 2+
+NH4OH (aq)
white ppt forms
insoluble in excess
Ca 2+
+NaOH (aq)
white ppt
insoluble in excess
Ca 2+
+NH4OH (aq)
no pp
NH4 +
+NaOH (aq)
no ppt
heat → NH3 (g)
NH4 +
+NH4OH (aq)
no ppt forms
Fe 2+
+NaOH (aq) / NH4OH (aq)
green ppt forms
insoluble in excess
Fe 3+
+NaOH (aq) / NH4OH (aq)
reddish brown ppt
insoluble in excess
Cu 2+
+NaOH (aq)
light blue ppt
insoluble in excess
Cu 2+
+NH4OH(aq)
light blue ppt
dissolves in excess → dark blue solution