The reaction between acetic acid (CH3COOH) and potassium (K) would result in the formation of potassium acetate (CH3COOK) and hydrogen gas (H2).

The balanced chemical equation for this reaction is:

2CH3COOH + 2K -> 2CH3COOK + H2

This reaction is a single displacement reaction where potassium displaces hydrogen from acetic acid to form potassium acetate and hydrogen gas is released as a byproduct.