document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=971516>Question 971516</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Peter has 100ml of 40% citric acid on hand.  The photo developer requires 500ml of 2% citric acid solution. How would he make it? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #593962 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=593962\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 100 ml *(.40) citric acid =40 ml pure citric acid.\r<BR>\n" );
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document.write( "500 ml of 2% citric acid is 500 ml (.02) citric acid and is 10 ml pure citric acid\r<BR>\n" );
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document.write( "He needs 25 ml of the 40% citric acid and enough water to make 500 ml.\r<BR>\n" );
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document.write( "He is diluting it from 40% to 2%, which is 20 fold.\r<BR>\n" );
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document.write( "He needs 20 fold water.\r<BR>\n" );
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document.write( "500 ml/25 ml =20 fold dilution. </SPAN>\n" );
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