The chemical equation for the reaction of acetic acid (CH3COOH) and potassium hydroxide (KOH) is:

CH3COOH + KOH → CH3COOK + H2O

This reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water. In this case, the salt formed is potassium acetate (CH3COOK). The reaction proceeds via a proton transfer from the acetic acid to the hydroxide ion, resulting in the formation of water and the acetate ion.