Analytical Chemistry Question 73
Question: In fifth group, $ {{( NH_4 )}_2}CO_3 $ is added to precipitate out the carbonates. We do not add $ Na_2CO_3 $ because
[AIIMS 1982]
Options:
A) $ CaCO_3 $ is soluble in $ Na_2CO_3 $
B) $ Na_2CO_3 $ increases the solubility of fifth group carbonates
C) $ MgCO_3 $ will be precipitated out in fifth group
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
As $ Na_2CO_3 $ is a strong electrolyte it will cause the precipitation of MgCO3. So (NH4)2CO3 is used as it’s a weaker electrolyte than $ Na_2CO_3. $
BETA
