document.write( "Question 117298: We disinfect with 8% strength Sodium Hypochlorite. We've run out of that and have to make a solution using 12.5% strength. We have 1200 gallons of water. How much of the 12.5% strength do we use in the 1200 gals of water to produce an 8% strength Sodium Hypochlorite solution? \n" ); document.write( "
Algebra.Com's Answer #85325 by stanbon(75887)\"\" \"About 
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We disinfect with 8% strength Sodium Hypochlorite. We've run out of that and have to make a solution using 12.5% strength. We have 1200 gallons of water. How much of the 12.5% strength do we use in the 1200 gals of water to produce an 8% strength Sodium Hypochlorite solution?
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\n" ); document.write( "12.5% DATA:
\n" ); document.write( "Amt = x gals ; active ingredient = 0.125x gals
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\n" ); document.write( "Water DATA:
\n" ); document.write( "Amt ; 1200 gal ;active = 0 gals
\n" ); document.write( "---------------
\n" ); document.write( "8% Mixture DATA:
\n" ); document.write( "Amt = 1200 + x ; active = 0.08(1200+x) = 96 + 0.08x gals
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\n" ); document.write( "EQUATION:
\n" ); document.write( "active + active = active
\n" ); document.write( "0.125x + 0 = 96+0.08x
\n" ); document.write( "0.045x = 96
\n" ); document.write( "x = 2133 1/3 gallons ( amt of 12.5% that needed for the mix)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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