In which of these reactions in aqueous solution, does a precipitate form? Watch

Thisisj
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#1
Report Thread starter 7 years ago
#1
a bit confused
there can be more than one answer

options are:
Be(OH)2 + XS NaOH
AlCl3 + XS Na2CO3
CuSO4 + XS NH3 (aq)
SiCL4 + XS H20




P.s can NH2- behave as a ligand? i know that Nh3 can...
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charco
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#2
Report 7 years ago
#2
(Original post by Thisisj)
a bit confused
there can be more than one answer

options are:
Be(OH)2 + XS NaOH
AlCl3 + XS Na2CO3
CuSO4 + XS NH3 (aq)
SiCL4 + XS H20
AlCl3 + XS Na2CO3

is the only one
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Thisisj
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Report Thread starter 7 years ago
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(Original post by charco)
AlCl3 + XS Na2CO3

is the only one
are you sure??
because the options are
(1,2,3)
(1,3)
(2,4)
(4 only)
There is no option with 2 only ...
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User544981
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#4
Report 7 years ago
#4
(Original post by Thisisj)
a bit confused
there can be more than one answer

options are:
Be(OH)2 + XS NaOH
AlCl3 + XS Na2CO3
CuSO4 + XS NH3 (aq)
SiCL4 + XS H20




P.s can NH2- behave as a ligand? i know that Nh3 can...
nh2 does have a lone pair
yes nh2 can behave as a ligand eg h2nch2ch2nh2 but it acts as a bidentate ligand so the ligand donates 2 lone pairs of electron to the central metal ion
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charco
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(Original post by Thisisj)
are you sure??
because the options are
(1,2,3)
(1,3)
(2,4)
(4 only)
There is no option with 2 only ...
In that case they are probably counting silicic acid as a ppt:

SiCl4 + 4H2O --> H4SiO4 + 4HCl

It's a funny one because it forms a gel like structure...
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Thisisj
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#6
Report Thread starter 7 years ago
#6
(Original post by hahaff)
nh2 does have a lone pair
yes nh2 can behave as a ligand eg h2nch2ch2nh2 but it acts as a bidentate ligand so the ligand donates 2 lone pairs of electron to the central metal ion

(Original post by charco)
In that case they are probably counting silicic acid as a ppt:

SiCl4 + 4H2O --> H4SiO4 + 4HCl

It's a funny one because it forms a gel like structure...
Thanks
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