Answer to 2D.
V
CN
-
[CN
-
]
V.H
3
O
[H
3
O
+
]
V
T
[HCN
25
(25/30)*3
=2.5M
5
(5/30)*5
=.834
30mL
0
Start
-.834
-.834
+.834
Rxt LR
1.666
0
.834
remain