Answer: Hope this helps:
The balanced equation for the reaction of the acetylide ion (HC=C) with water (H2O) as a Brønsted-Lowry base is:
HC=C + H2O → HC(OH)=C
The equilibrium constant (K₁) expression for this reaction can be expressed as follows:
K₁ = [HC(OH)=C] / [HC=C][H2O]
where [ ] represents the concentration of the species in moles per liter (M).