document.write( "Question 1207820: A laboratory has 60 cubic centimeters (cm^3) of a solution that is 40% HCl acid. How many cubic centimeters of a 15% solution of HCl acid should be mixed with the 60 cm^3 of 40% acid to obtain a solution of 25% HCl? How much of the 25% solution is there? \n" ); document.write( "
Algebra.Com's Answer #845935 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
To ignore denstities and choice between w/w, w/v;\r
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\n" ); document.write( "\n" ); document.write( "60 volume units of 40 % solution;
\n" ); document.write( "Solution available to mix, 15%;
\n" ); document.write( "Mix result wanted, 25%.\r
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\n" ); document.write( "\n" ); document.write( "v, amount of the 15% solution to add and mix:\r
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\n" ); document.write( "\n" ); document.write( "\"%2860%2A0.4%2B0.15v%29%2F%28v%2B60%29=0.25\"--------this equation without explanation; based on thinking in decimal fractions; solve for v.\r
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\n" ); document.write( "\n" ); document.write( "..... maybe a little explanation.\r
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\n" ); document.write( "\n" ); document.write( "Amount of resulting solute: \"0.4%2A60%2B0.15v\"\r
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\n" ); document.write( "\n" ); document.write( "Amount of resulting mixture: \"v%2B60\"\r
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\n" ); document.write( "\n" ); document.write( "As a rational expression, if 25% solution is wanted, this is 0.25.
\n" ); document.write( "amount of solute as numerator and amount of final mixture as denominator
\n" ); document.write( "must be equal to 0.25.
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