In the experiment above, X could be a solution of

Azeez1902

6 years ago

For the choosen answer to be correct, it ought to have been sodium dioxonitrate (iii) and ammonium chloride. Please make correction my school

olyezema

4 years ago

the diagram above is the preparation of dinitrogen(I) oxide..........the solution is a mixture of potassium trioxonitrate(V) and ammonium chloride.
New school chemistry page 413

djayenimoney

4 years ago

B is correct fellas

princedean123

6 months ago

Step 1: Analyze the clues

Forms a white precipitate → Could be Al³⁺, Zn²⁺, Pb²⁺, Ca²⁺, etc.

Soluble in excess NaOH → Indicates amphoteric behavior

Amphoteric cations: Al³⁺, Zn²⁺, Pb²⁺

Non-amphoteric: Ca²⁺, Na⁺ → insoluble in excess NaOH

Insoluble in excess NH₃ → Rules out Zn²⁺ (Zn(OH)₂ dissolves in NH₃ forming [Zn(NH₃)₄]²⁺)

Dissolves in dilute HCl → Confirms it is a hydroxide like Al(OH)₃ or Pb(OH)₂

Step 2: Narrow down possibilities
Cation Amphoteric? Soluble in NaOH? Soluble in NH₃?
Al³⁺ Yes Yes No
Zn²⁺ Yes Yes Yes
Pb²⁺ Yes Yes No
Ca²⁺ No No No
Na⁺ No No No

Since the precipitate is insoluble in NH₃, Zn²⁺ is ruled out.

Among the remaining amphoteric cations, Al³⁺ is the classic example in textbooks.

Answer:

D. Al³⁺

Mernicorm

1 year ago

please make corrections to the question its confusing
it should be dioxo not trioxo

Tprince443

7 years ago

Correct!

TennyB

2 years ago

There is no experiment above