When I dilute a solution with deionized water, will it change the pH and ORP?

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Bruce Neagle

Not likely.

Mohamed Hassaan

No, but be sure of the pH of your D.W. and it is stable and clean before using it.

Hongzhu Liao

Why not try and see? It is a simple experiment. An analytical chemistry lab should have a pH meter.

Namrata Dhakal

Not sure about ORP, but pH will definitely change. As you dilute acidic solution with water, the concentration of H+ in the final medium decreases, pH= -log[H+] so then pH will increase.