Answer to 2D.
V
CN-
[CN-]
V.H3O
[H3O+]
VT
[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