pH calculations for process streams

[newbie12]

Hi All,

I am trying to calculate the effect of reducing NaOH dosing rate on the pH.
Its difficult to explain so I've attached the excel file.

Regards,

Any tips are well appreciated!

 

[newbie12]

Sorry should add that the reason why I am reducing the NaOH is that I am adding milk of lime solution in the preceding stages.

I am aware that the pH will increase significantly which is why I need to reduce the NaOH in the preliminary steps and set up a new pH set point.

I am trying to calulate how much the pH changes for the addition of milk of lime solution (reducing NaOH dosing rates)