If you treat an aldehyde wiith HCN you produce a cyanohydrin. For example,
However, if you treat formaldehyde (CH2O) with potassium cyanide in water, you will not produce the cyanohydrin. You may even produce C3H6O3 (i.e., dihydroxyacetone and glyceraldehyde). Explain this either in words or reactions.
Cyanohydrin formation is one of the most important reactions of aldehydes and ketones.
RCHO + HCN = RCH(OH) CN
If we go into the details of this reaction, we see ...
This solution explains cyanohydrin formation as a reaction of aldehydes and ketones.