Hi,

I'm hoping someone smarter than me can help with calculating dilution amount based off chemical ratios.

In our chemical cabinet setup, we have 3 chemicals that are mixed together, NH4OH, H2O2 and DIW [water]

Size of the tank the chemicals are mixed into is 35L.

If we have a ratio of 1:1:5 [NH4OH:H2O2:DIW]

My flowrates would be set to the following for 1:1:5

NH4OH: 2000 mL/min

H2O2: 2000 mL/min

DIW: 10 L/min.

What I would like to do with this information is to be able to calculate flowrates for NH4OH, H2O2 and DIW based off the ratio I set.

Tank size is a constant value. It will always fill to 35L.

Example: If I set the ratio to 1:1:25, what do my flowrates need to be for NH4OH, H2O2 and DIW?

My goal is to ultimately put these calculations into an Excel spreadsheet where I just enter the ratio and Excel calculates the flowrates, but I need to first understand how to calculate them.

Thanks for your support!