document.write( "Question 585098: First part : 256 ml of 32% solution HCL is mixed with 125 ml of 20% solution HCL and 265 ml H2O. To calculate how many percent solution will be obtained.
\n" ); document.write( "Second part: Than calculate how much HCL is needed to get 55% solution?\r
\n" ); document.write( "\n" ); document.write( "- I got the first part : (256 x 32)+(125 x 20)+(265) / 256+125+265= 16,9% solution.
\n" ); document.write( "So now I have 646 ml of 16,9 % HCL solution.\r
\n" ); document.write( "\n" ); document.write( "Second part : I guess I have 100% HCL, but I can't figure out how to calculate the ml's I need to get to 55%.\r
\n" ); document.write( "\n" ); document.write( "Thanks
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Algebra.Com's Answer #373130 by richwmiller(17219) $\"\"$ $\"About$

You can put this solution on YOUR website!
.32*256+125*.20=x*(256+125)
\n" ); document.write( "106.92=381x
\n" ); document.write( "x=.28063
\n" ); document.write( "which is 28.063 % of 381 ml\r
\n" ); document.write( "\n" ); document.write( "now add 256 ml of water
\n" ); document.write( "637 ml of solution
\n" ); document.write( ".28063*381=637x
\n" ); document.write( "x=.167849
\n" ); document.write( "16.7849 % solution of 637 ml\r
\n" ); document.write( "\n" ); document.write( ".167849*637+x=.55*(637+x)
\n" ); document.write( "add 540.596 ml pure HCL to get 55% solution\r
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