# Can someone Help me in this Problem ? along with an explanation

Which one of the Following choices is correct , and why ??

Note by Ahmed Hassaneen
5 years, 8 months ago

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According to me, the answer should be (2), as all the other metal cations form complexes.

Silver forms $[ Ag(NH_{3})_2]^{+1}$

Copper forms $[ Cu(NH_{3})_4]^{+2}$

Zinc forms $[ Zn(NH_{3})_4]^{+2}$

- 5 years, 8 months ago

ELI5: What is a complex?

- 5 years, 8 months ago

A complex is a coordination compound formed by ligands and a central metal atom. You can further study it on wiki

- 5 years, 8 months ago

Usually such reactions involves complexation. Ammonia is a strong field ligand, it easily forms complexes with most metal cations, except a few like aluminium. The result follows.

- 5 years, 8 months ago

All metals can form complexes and Al can't so it's 2

- 5 years, 8 months ago

when Al (OH)3 react with NH4OH it precipitates as the solubility of Al (OH)3 is less in NH4OH than in water

- 5 years, 8 months ago

I think the same, the answer is 2. Beacuse The reaction of alumunium with amonia cant form a complex, altough amonia is a good ligant. Because the reaction just form Al(OH)2, who have a low solubility in the more reagent. While the ions of the other metals, if they reacted with a little of ammonia, they'll precipitate to form Ag2O, Zn(OH)2, Cu(OH)2. But they are can soluble with more ammonia, which each form their complex compound, like avineil jain was told. Sorry i cant give my expalanation well, i have the bad english.

- 5 years, 8 months ago

- 5 years, 8 months ago

I think its 2 Al(OH)³

- 5 years, 8 months ago

Answer is 2 becoz 1 and 3 can form complex salts with aqueous ammonia and 4 is hydroxide of an amphoteric metal. So all that is left is 2

- 5 years, 8 months ago

ANS:- 2 THIS IS THE ULTIMATE ANSWER AS I HAVE POSTED THIS.

- 5 years, 7 months ago

As told by Avineil Jain I was also thinking the that same concept

- 5 years, 8 months ago

1

- 5 years, 8 months ago

- 5 years, 8 months ago

except aluminium all others are d- block elements. they can form complexes. p - block element Al cannot form

- 5 years, 8 months ago

- 5 years, 8 months ago

twoooo.cause Al cant form complex ones.

- 5 years, 8 months ago

- 5 years, 8 months ago

The answer is 2 because all others can form complexes

- 5 years, 8 months ago

3

- 5 years, 8 months ago

Ans is 2

- 5 years, 8 months ago

- 5 years, 8 months ago

Al(OH)3

- 5 years, 8 months ago

- 5 years, 8 months ago

Al(OH)3 is insoluble, because aqueous ammonia creates the conditions for it to precipitate. At lower pH it will be dissolved as Al3+.6H2O, at higher pH it will be dissolved as Al(OH)6(3-).

- 5 years, 8 months ago

I think it is 1st option

- 5 years, 8 months ago

2) Al(OH)3 is insoluble in aqueous ammonia

- 5 years, 8 months ago

Al(OH)3

- 5 years, 8 months ago

Al(OH)3 doesn't form a complex in ammonia, so it should be 2. The rest react with ammonia.

- 5 years, 8 months ago

Aloh3

- 5 years, 8 months ago

- 5 years, 8 months ago

Its Al(OH)3 because it will form precipitation.

- 5 years, 8 months ago

The answer is 2, because it can't form complexes with Aluminium.

- 5 years, 8 months ago

The answer is 2 because all others can form complex

- 5 years, 8 months ago

Option (2)

- 5 years, 8 months ago

- 5 years, 8 months ago

Because all others are already in aqueous form as hydroxide is already there

- 5 years, 8 months ago

according to me ans should be 1 all three have oh- ions

- 5 years, 7 months ago

Al(oh)2

- 5 years, 7 months ago

it is Al(OH)3 becoz it will not make complex compound with ammonia. other do as Ag(NH3)2Cl, Cu(NH3)4(OH)2,Zn(NH3)4(OH)2

- 5 years, 7 months ago

2

- 5 years, 7 months ago

4

- 5 years, 7 months ago

I think that ans is 2 bcoz all other are made from complexes

- 5 years, 7 months ago

Agcl

- 5 years, 7 months ago

I thing (2) answer because other makes them complex.

- 5 years, 7 months ago

a, Agcl is insoluble to ammonia, AgCl is a metallic salt.

- 5 years, 7 months ago

a)

- 5 years, 7 months ago

its 4th option

- 5 years, 8 months ago

AgCl2

- 5 years, 8 months ago