1
Q
Fe2+
A
Add dilute NaOH to the solution. A dirty green ppt. will form.
2
Q
Fe3+
A
Add dilute NaOH to the solution. A reddish-brown ppt. will form.
3
Q
Al3+
A
In two separate test tubes, add NaOH and NH3 to the solution. A white ppt will form. It is soluble in excess NaOH but not excess NH3.
4
Q
Ca2+
A
In two separate test tubes, add NaOH and NH3 to the solutions. White ppt. will form in NaOH and a little white ppt / no at all will form in NH3. Both insoluble in excess.
5
Q
Zn2+
A
In two separate test tubes, add NaOH and NH3 to the solution. White ppt will form and both soluble in excess.
6
Q
Cu2+
A
Add NaOH to the solution. It will form light blue precipitate.
Qualitative Analysis
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