Equilibrium Question 822
Question: Addition of which chemical will decrease the hydrogen ion concentration of an acetic acid solution
Options:
A) $ NH_4Cl $
B) $ Al_2{{( SO_4 )}_3} $
C) $ AgNO_3 $
D) $ NaCN $
Show Answer
Answer:
Correct Answer: D
Solution:
$ \underset{(Hydrolysis)}{\mathop{NaCN+H_2O}},\rightarrow NaOH+HCN $
$ NaOH $ will give $ O{H^{-}} $ ions and react with $ {H^{+}} $ to form $ H_2O $ hence decrease the concentration of $ {H^{+}} $ ions.
