document.write( "Question 508018: A chemistry student has a 15% hydrochloric acid solution and a 40% hydrochloric acid solution. How many liters of each should she mix to get 10 liters of a hydrochloric acid solution with a 30% acid concentration? \n" ); document.write( "
Algebra.Com's Answer #340953 by Maths68(1474)\"\" \"About 
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Solution A
\n" ); document.write( "Amount = x liters
\n" ); document.write( "Concentration =15% = 0.15
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\n" ); document.write( "Solution B
\n" ); document.write( "Amount =(10- x) liters
\n" ); document.write( "Concentration =40% = 0.40
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\n" ); document.write( "Resultant Solution
\n" ); document.write( "Amount = 10 liters
\n" ); document.write( "Concentration = 30%=0.30
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\n" ); document.write( "[Amount Solution A * Concentration A] + [Amount Solution B * Concentration of B] = Amount of Resultant * Concentration of resultant
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\n" ); document.write( "Put the value in above equation
\n" ); document.write( "(x*0.15)+((10-x)*0.40=10*0.30
\n" ); document.write( "0.15x+4-0.4x=3
\n" ); document.write( "-0.25x=3-4
\n" ); document.write( "-0.25x=-1
\n" ); document.write( "Divide by -0.25 both sides
\n" ); document.write( "-0.25x/-0.25=-1/-0.25
\n" ); document.write( "x=4
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\n" ); document.write( "Amount of solution A =4 liters
\n" ); document.write( "Amount of Sultion B = 10-x=10-4=6 liters
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\n" ); document.write( "A chemistry student has a 15% hydrochloric acid solution and a 40% hydrochloric acid solution.He has to mix 4 liters of 15% solution and 6 liters of 40% to get 10 liters of a hydrochloric acid solution with a 30% acid concentration?
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