Can someone Help me in this Problem ? along with an explanation
Which one of the Following choices is correct , and why ??
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Ahmed Hassaneen
7 years ago
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According to me, the answer should be (2), as all the other metal cations form complexes.
Silver forms [Ag(NH3)2]+1
Copper forms [Cu(NH3)4]+2
Zinc forms [Zn(NH3)4]+2
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ELI5: What is a complex?
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A complex is a coordination compound formed by ligands and a central metal atom. You can further study it on wiki
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.
All metals can form complexes and Al can't so it's 2
when Al (OH)3 react with NH4OH it precipitates as the solubility of Al (OH)3 is less in NH4OH than in water
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.
the answer is (2),AL(OH)3
I think its 2 Al(OH)³
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
ANS:- 2 THIS IS THE ULTIMATE ANSWER AS I HAVE POSTED THIS.
As told by Avineil Jain I was also thinking the that same concept
1
The answer is 2
except aluminium all others are d- block elements. they can form complexes. p - block element Al cannot form
answer is 2
twoooo.cause Al cant form complex ones.
Answer is 2
The answer is 2 because all others can form complexes
3
Ans is 2
Answer is no. 2
Al(OH)3
Yaa its answer 2
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-).
I think it is 1st option
2) Al(OH)3 is insoluble in aqueous ammonia
Al(OH)3
Al(OH)3 doesn't form a complex in ammonia, so it should be 2. The rest react with ammonia.
Aloh3
2 is the answer
Its Al(OH)3 because it will form precipitation.
The answer is 2, because it can't form complexes with Aluminium.
The answer is 2 because all others can form complex
Option (2)
The answer is AgCl
Because all others are already in aqueous form as hydroxide is already there
according to me ans should be 1 all three have oh- ions
Al(oh)2
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
2
4
I think that ans is 2 bcoz all other are made from complexes
Agcl
I thing (2) answer because other makes them complex.
a, Agcl is insoluble to ammonia, AgCl is a metallic salt.
a)
its 4th option
AgCl2