SOLUTION: How many ounces of 12.5% Sodium Hypochlorite to make 5% sodium Hypochlorite in 2.5 gallons of H20?

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Question 419606: How many ounces of 12.5% Sodium Hypochlorite to make 5% sodium Hypochlorite in 2.5 gallons of H20?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many ounces of 12.5% Sodium Hypochlorite
to make 5% sodium Hypochlorite in 2.5 gallons of H20?
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Equation:
sodium + sodium = sodium
0.125x = 0.05(2.5 + x)
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Multiply thru by 1000 to get:
125x = 50*2.5 + 50x
75x = 50*2.5
x = (2/3)(2.5)
x = 1 2/3 gallons of 12.5% Sod Hypo
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I guess that would be 0.125*(5/3) = 0.20833 ounces of Sod Hypo
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Not sure.
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Cheers,
Stan H.