test for aq cations Flashcards
Ammonium NH4+
Effect of aq sodium hydroxide: Ammonia produced on warming
Calcium Ca2+
Effect of aq sodium hydroxide: white ppt insoluble in excess
Effect of aq ammonia: no ppt or very slight white ppt
copper Cu2+
Effect of aq sodium hydroxide: light blue ppt insoluble in excess
Effect of aq ammonia: light blue ppt soluble in excess giving a dark blue solution
iron(II) Fe2+
Effect of aq sodium hydroxide: green ppt insoluble in excess
Effect of aq ammonia: green ppt insoluble in excess
iron(III) Fe3+
Effect of aq sodium hydroxide: red-brown ppt insoluble in excess
Effect of aq ammonia: red-brown ppt insoluble in excess
zinc Zn2+
Effect of aq sodium hydroxide: White ppt soluble in excess giving a colourless solution
Effect of aq ammonia: White ppt soluble in excess giving a colourless solution