Respuesta :
when an acid is added to water, hydronium ions stay the same
Answer:
B. decrease
Explanation:
Base dissociate to give out OH- ions
In the other hand ,when water (H2O) dissociate it give out hydronium ions ( H3O+) and OH- ions
when base is added to water more OH- it led to addition of more Oh- ions hence H3O+ decrease.