The pH of a solution is 6.0. Explain how the addition of the following substance would alter (or not alter) the pH of the solution.

Question

a. HCl
b. NaOH
c. H20

Answer 1

Adding acid will make it more acid; pH will go down.
Adding base will make the solution more basic; pH will go up.
Adding water will make the solution more dilute and it will change the pH somewhat (a little more basic making pH go up); how much depends upon how much water is added and the identity of the solution.