Question

Ionisation of sodium chloride does not affect the local concentrations of hydrogen ions or hydroxide ions, so nacl, like many salts, is a neutral solute.

Answer 1

addition of salt of strong acid and strong base like NaCl to water does nothing to pH becoz the species formed OH- and H+ balance each other out . however if salt of strong base and weak acid is added to water like ( Sodium acetate) then addition of this salt will result in basic pH.

and if salt is of weak acid and strong base like (ammonium chloride) is added to water it will result in acidic solution.