In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.

La regla de Markovnikov predice la regioselectividad en las reacciones de
Markovnikov's rule predicts regioselectivity in the reactions of

En una potenciometría a intensidad nula el electrodo
In a potentiometry at zero intensity the electrode

Una voltamperometría cíclica

A cyclic voltammetry