Answer to 2A. Net Ionic Equation
n
NaCN
(aq)
+ HCl
(aq)
à
n
Na
+
(aq)
+CN
-
(aq)
+ H
3
O
+
(aq)
+ Cl
-
(aq)
à
n
CN
-
(aq)
+
H
3
O
+
(aq)
à
HCN
(aq)
+ H
2
O
(l)
Step back to the problem
Dissociate the reactants where possible, and discard any neutral species.
This allows you to clarify the problem and focus on the real source of the pH changes.