Potentiometric studies show the interaction between the copper electrode surface and the propyl alcohol (H 3 C-CH 2 -CH 2 OH), allylic (H 2 C = CH-CH 2 OH) and propargylic (HC = CH 2 OH) . Of these, only the alicyclic and propargylic alcohols alter the potential equilibrium value of the electrode when added in the aqueous solution of H 2 SO 4. The value of the displacement of the potential indicates a very strong interaction, characterizing, even, a chemical adsorption, very stable with the time. The electrode responds quickly to the presence of the alcohols and depends differently from the added concentration. More concentrated acid solutions do not interfere with the adsorption of the compounds. However, the presence of dissolved oxygen in the solution decreases, but does not prevent the displacement of the electrode potential. The increase in solution temperature showed that allyl alcohol absorbs weaker than propargyl alcohol, since the equilibrium potential shift was lower.
