[flanaha27]

Hi everyone, here is a question that I would love to see solved if there are any takers..

There are 3 soluble powders. 

Soluble powder 1 is X% Nitrogen, Y% Phosphorus, Z% Potassium.

Soluble powder 2 is Calcium Nitrate.  Calcium Nitrate has a Nitrogen content of 15.5%.

Soluble powder 3 is Magnesium Sulfate.

For each ounce of Calcium Nitrate that is added into a 1000 gallon container of water the PPMs (Parts Per Million) levels for Nitrogen will increase by 1.15 and the PPMs for Calcium will increase by 1.40.

For each ounce of Magnesium Sulfate that is added into a 1000 gallon container of water the ppm's for Magnesium will increase by .73 ppm.

What are the optimal values for X, Y, Z, as well as the optimal amounts one should use of soluble powder 1, soluble powder 2, and soluble powder 3 that will yield the following values in a 1 gallon container of water.

3% Nitrogen, 1% Phosphorus, and 2% Potassium

Calcium 3.6%
Magnesium .5%

[thelastone]

Apart from the fact that you haven't even tried  , this is a chemical engineering forum: maybe you could try programming a little program to solve it out? or maybe program it with excel solver?

As noted above, this forum it's to discuss solutions, not to give them. Please provide feedback so we could discuss it.

[Furanone]

Yes, I agree Excel Solver would make quick work of this. If you do not know how to use this very useful resource in Excel, I highly recommend learning it. It should only take less than 30 minutes if you watch some tutorials about it on YouTube.

https://www.youtube.com/watch?v=K4QkLA3sT1o

here is a site devoted to teaching Excel to Chemical Engineers:

https://www.youtube.com/watch?v=0UCxrt4nI3A&list=PLGED90Y_uL1Ji9LShCQ7Z0xpl1_bxusxO