eau neutre

OBS: Les valeurs du pH de 0 à 14 recouvrent [...] l'intervalle des solutions fortement acides ou solutions fortement basiques. Le pH de l'eau pure, à la température ordinaire, est de 7.
OBS: neutre : Qui n'est ni acide ni basique, dont le pH est égal à 7.

CONT: A pH value of 7 corresponds to the hydrogen ion concentration of neutral water .... A solution with a pH value less than 7 is considered acidic. A solution with a pH value greater than 7 is considered basic. If the pH value is exactly 7, such as a solution of sodium chloride in water, it is called neutral.