Sodium carbonate cannot be used in place of 
for the identification of 
and 
(in group 
) during mixture analysis because
A
ions will react with acid radicals
B
ions will interfere with the detection of 
and 
ions
C
Concentration of 
ions is very low
ions is very low
D
ions will also be precipitated
Text Solution
Verified by ExpertsThe correct answer is:
D
If 
is used in place of 
.
It will precipitate group 
recticals as well as magnesium radical. The reason for this is the high ionisation of 
in water into 
and 
.
So, the higher concentration of 
is available which exceeds the solubility product of group 
radicals as well as that of magnesium radical.
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