Buy Alum Sulfate for 8000 Gal 48% Solution

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To prepare 8,000 gallons of a 48% alum sulfate solution, first determine the density of the 48% solution. The weight of a gallon of water is multiplied by the specific gravity of the 48% alum sulfate to find the weight of one gallon of the solution. This weight is then multiplied by 0.48 and subsequently by 8,000 to calculate the required amount of anhydrous aluminum sulfate. If purchasing octadecahydrate, the calculated amount should be multiplied by the ratio of 666/342, and for hexadecahydrate, by the ratio of 648/342 to obtain the correct quantity needed.
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How many pounds of alum sulfate do I need to buy to make 8000 gallons of 48% solution.
Thank you
 
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You do it the same way you did the 25% NaOH solution. You will need to determine the density of 48% alum sulfate first.
 
I did review that answer before I posted , but I don't know how to calculate the solution weight of 25% NaOh or 48% Aluminum Sulfate
 
Can you figure weight of solution with specific gravities?
 
obrien040362 said:
Can you figure weight of solution with specific gravities?

Yes. Multiply the weight of a gallon of water by the specific gravity of your want to be alum solution to get the weight of a gallon of 48% w/w alum sulfate. Multiply that by. 48 and multiply that answer by 8000.

That's how much anhydrous aluminum sulfate you will need to use. If you are purchasing the octadecahydrate, multiply that number by the ratio (666/342). If purchasing the hexadecahydrate multiply it by the ratio (648/342).
 
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