An aqueous solution contains 0.30 Mhydrocyanic acid.
One Liter of this solution could be converted into a buffer bythe addition of which of the following reagents?
(Assume that the volume remains constant as each substance isadded.)
Question 15 options:(more than one choice)
| 0.15 mol HClO4 |
| 0.30 mol KClO4 |
| 0.31 mol HClO4 |
| 0.31 mol KCN |
| 0.149 mol NaOH |
