Test for cations using aqeous ammonia

Question 1

What will happen when aqeuous ammonia is added to Ca2+ ion?

Answer 1

No ppt formed. Applying excess is not applicable.

Question 2

What will happen when aqeous ammonia is added to Zn2+ ion?

Answer 2

White ppt formed, soluble in excess of aqeous ammonia.

Question 3

What will happen when aqeuous ammonia is added to Al3+ ions?

Answer 3

White ppt formed, insoluble in excess of aqeuous ammonia.

Question 4

What will happen when aqeuous ammonia is added to Pb2+ ions?

Answer 4

A white ppt is formed, insoluble in excess of aqeuous ammonia.

Question 5

What will happen when aqeous ammonia is added to Fe2+ ions?

Answer 5

Green ppt formed, insoluble in excess of aqeous ammonia.

Question 6

What will happen when aqeuous ammonia is added to Fe3+ ions?

Answer 6

Reddish-brown ppt formed, insoluble in excess of aqeuous ammonia.

Question 7

What will happen when aqeuous ammonia is added to Cu2+ ions.

Answer 7

A blue ppt is formed, soluble in excess of aqeuous ammonia to give a dark blue solution.