Analytical Chemistry Question 120
Question: The presence of $ NH_4Cl $ in the test solution while precipitating group III-A hydroxides (in qualitative inorganic analysis) helps in
Options:
A) Lowering $ [ O{H^{-}} ] $
B) Lowering $ [ NH_4OH ] $
C) Increasing $ [ O{H^{-}} ] $
D) Increasing $ [ NH_4OH ] $
Show Answer
Answer:
Correct Answer: A
Solution:
$ NH_4OH~NH_4^{+}+O{H^{-}} $
$ NH_4Cl\to NH_4^{+}+C{l^{-}} $
$ NH_4Cl $ Decreases the dissociation of $ NH_4OH $ by common ion effect
BETA
