document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=334336>Question 334336</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much pure hydrocloric acid must be added to 40 milliliters of a 50% solution to obtain a 75% acid solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #239548 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=239548\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  How much pure hydrocloric acid must be added to 40 milliliters of a 50% solution to obtain a 75% acid solution?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.50*40 + x = 0.75(40+x)<BR>\n" );
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document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "50*40 + 100x = 75*40 + 75x<BR>\n" );
document.write( "25x = 25*40<BR>\n" );
document.write( "x = 40 milliters (amt. of pure HCL needed for the mixture)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=========== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );