document.write( "Question 306546:
\n" ); document.write( "How much 1% boric acid solution and 5% boric acid solution are needed to make 30 mL of 3% boric acid solution?
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Algebra.Com's Answer #219361 by mananth(16946) $\"\"$ $\"About$

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How much 1% boric acid solution and 5% boric acid solution are needed to make 30 mL of 3% boric acid solution?\r
\n" ); document.write( "\n" ); document.write( "let 1% boric acid solution required be x ml
\n" ); document.write( "The concentration in the mixture will be 1/100* x = 0.01x
\n" ); document.write( "The balance 30-x ml will be 5% solution
\n" ); document.write( "The concentration of this in the mixture will be 0.05*(30-x)\r
\n" ); document.write( "\n" ); document.write( "The concentration of the total mixture will be 0.03 * 30\r
\n" ); document.write( "\n" ); document.write( "0.01x+0.05(30-x)= 0.03*30\r
\n" ); document.write( "\n" ); document.write( "0.01x+ 1.5 - 0.05x = 0.9 \r
\n" ); document.write( "\n" ); document.write( "-0.04x= -0.6\r
\n" ); document.write( "\n" ); document.write( "x=0.6/0.04\r
\n" ); document.write( "\n" ); document.write( "x=15 ml 1 % solution\r
\n" ); document.write( "\n" ); document.write( "balance 15 ml will be 3% solution\r
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