Cations

Question 1

Adding NaOH to copper (II)

Answer 1

Blue ppt insoluble in excess

Question 2

Adding NaOH to Iron(II)

Answer 2

Green ppt insoluble in excess

Question 3

Adding NaOH to Iron (III)

Answer 3

Red/brown ppt insoluble in excess

Question 4

Adding NaOH to Chromium (III)

Answer 4

Green ppt soluble in excess to form a darker green solution

Question 5

Adding NaOH to aluminium (II)

Answer 5

white ppt soluble in excess

Question 6

Adding NaOH to Calcium (II)

Answer 6

White ppt insoluble in excess

Question 7

Adding NaOH to zinc (II)

Answer 7

White ppt soluble in excess

Question 8

Adding NH3 to Copper (II)

Answer 8

Blue ppt soluble in excess to form a darker blue solution

Question 9

Adding NH3 to iron (III)

Answer 9

Red/brown ppt insoluble in excess

Question 10

Adding NH3 to Iron (II)

Answer 10

Green ppt insoluble in excess

Question 11

Adding NH3 to Chromium (III)

Answer 11

Green ppt insoluble in excess

Question 12

Adding NH3 to Aluminium (II)

Answer 12

white ppt insoluble in excess

Question 13

Adding NH3 to calcium (II)

Answer 13

No reaction

Question 14

Adding NH3 to Zn (II)

Answer 14

White ppt soluble in excess