Cation Tests

Question 1

(Ca)2+ & NaOH

Answer 1

White Ppt forms , Calcium Hydroxide, insoluble in excess

Question 2

(Zn)2+ & NaOH

Answer 2

White Ppt forms, Zinc Hydroxide , insoluble in excess

Question 3

(Pb)2+ & NaOH

Answer 3

White Ppt, Lead (II) Hydroxide, Dissolves in excess to form colourless solution

Question 4

(Fe)2+ & NaOH

Answer 4

Dirty green ppt, Iron (II) Hydroxide, Insoluble in excess

Question 5

(Fe)3+ & NaOH

Answer 5

Red Brown ppt, Iron (III) Hydroxide, Insoluble in excess

Question 6

(Cu)2+ & NaOH

Answer 6

light blue ppt, Copper (II) Hydroxide, insoluble in excess

Question 7

Ammonium Ion + NaOH

Answer 7

ammonia gas is evolved upon warming

Question 8

Ca2+ and Ammonia

Answer 8

No visible reaction or ppt formed

Question 9

Zn2+ and ammonia

Answer 9

White ppt formed, Zinc Hydroxide, dissolves in excess

Question 10

Pb2+ and ammonia

Answer 10

White ppt formed, Lead (II) Hydroxide, Insoluble in excess

Question 11

Fe2+ and ammonia

Answer 11

Dirty green ppt forms, Iron(II) Hydroxide, insoluble in excess

Question 12

Fe3+ and ammonia

Answer 12

red brown ppt forms, Iron (III) Hydroxide, insoluble in excess

Question 13

Cu2+ and ammonia

Answer 13

Light blue ppt forms, Copper (II) Hydroxide, Dissolves in excess to form dark blue solution