- Messages
- 211
- Reaction score
- 175
- Points
- 53
in the addition of a -CN to a halogenoalkane, ethanolic KCN is used right? but what always confuses me is that whether HCN, KCN or NaCn is added to aldehydes and alkenes.....some help? whats the difference? mark schemes are really confusing since even in them the answers are different everywhere