The reaction of sodium cyanide with water
Sodium cyanide is strong and toxic. It also reacts with water. Sodium cyanide ($NaCN $) meets water ($H_ {2} O $). Due to the weak ionization of water, there are $H ^ {+} $and $OH ^ {-} $. Cyanogen ions ($CN ^ {-} $) are protophilic, so they combine with $H ^ {+} $to produce hydrocyanic acid ($HCN $). The formula for this reaction is: $NaCN + H_ {2} O\ rightleftharpoons NaOH + HCN $.

Hydrocyanide is a bitter almond-flavored gas that is extremely toxic. Released in small amounts, it can cause people to be in danger. Therefore, the reaction of sodium cyanide with water must be handled with caution. In industrial or experimental settings, if sodium cyanide accidentally encounters water, it is necessary to take protective measures quickly to prevent hydrocyanic acid from escaping and endangering everyone's safety.

And this reaction is reversible. Under certain conditions, sodium hydroxide and hydrocyanic acid can also react in reverse to form sodium cyanide and water. The equilibrium is affected by various factors such as temperature and concentration. As the temperature rises, the reaction may move towards endothermic direction; increasing or decreasing the concentration of reactants and products can also change the equilibrium.

If you want to control this reaction and ensure safety, you must know its nature in detail, abide by the procedures, and deal with it with scientific methods in order to avoid disasters and ensure that everything goes smoothly.