Simulation pH scale is asking Initial pH of orange juice, I have 3.0 then asking tenfold and 100-fold dilution. Would I just move decimal point over to 0.3 for tenfold and 0.03 for 100-fold dilution. Also asking for initial pH of [H3O+] (mol/L) and [OH-] (mol/L), what would this be and is there a particular formula to use for these calculations of tenfold and100-fold?