QA Flashcards
1
Q
Al^3+, Zn^2+, Pb^2+
using aqueous NaOH
A
White ppt soluble in excess reagent, giving a colourless solution
2
Q
Al^3+ cation
In aqueous NH3
A
White ppt insoluble in excess reagent
3
Q
Ca^2+ in excess NaOH
A
Insoluble
4
Q
Ca^2+ in excess aqueous NH3
A
No observed reaction, no ppt formed
5
Q
Fe2+ in excess NaOH or aqueous NH3
A
Insoluble green ppt
6
Q
Fe^3+ in excess NaOH or aqueous NH3
A
Insoluble red-brown ppt
7
Q
Cu^2+ in excess NaOH
A
Insoluble blue ppt
8
Q
Cu^2+ in excess aqueous NH3
A
Blue ppt soluble in excess reagent to give dark blue solution
9
Q
NH^4+ in NaOH
A
No ppt formed
10
Q
Silver chloride
-insoluble salt
A
White
11
Q
Lead (II) iodide
-insoluble salt
A
Yellow
12
Q
Lead(II) sulfate
-insoluble salt
A
White
13
Q
Copper(II)sulfate (crystals)
A
Blue solid
14
Q
Copper(II) Oxide
A
Black solid
15
Q
Copper (II) Carbonate
A
Green solid
