The pH of highly purified water is exactly 7.0 by definition.
NO: the Ph scale. pH is ALWAYS spelled in exactly this way, and not in some other way that you made up.
+++
The third sentence is correct: it is pH, not Ph.
One defintion is Foreign Service Pension.
A solution with a pH of 7 compared to a solution with a pH of 9 would be more acidic.
The reactant concentrations decrease
An Arrhenius acid donates H+ ions. (apex).
4.5 (moI/L)/s -apex
NH3
NH4+
(PO4)3- is considered the conjugate base.
The answer is "The equilibrium would shift to reduce the pressure change" on Apex