document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=994765>Question 994765</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If you wish to increase the percent of acid in 50 mL of a 15% acid solution in water to a 25% acid, how much pure acid must you add?\r<BR>\n" );
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document.write( "Thank you.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #613783 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=613783\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you wish to increase the percent of acid in 50 mL of a 15% acid solution in water to a 25% acid, how much pure acid must you add? <BR>\n" );
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document.write( "let x = amt of pure acid required<BR>\n" );
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document.write( "A typical mixture equation based on the amt of acid in the water<BR>\n" );
document.write( ".15(50) + x = .25(x+50)<BR>\n" );
document.write( "7.5 + x = .25x + 12.5<BR>\n" );
document.write( "x - .25x = 12.5 - 7.5<BR>\n" );
document.write( ".75x = 5<BR>\n" );
document.write( "x = 5/.75<BR>\n" );
document.write( "x = 6<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3 ALIGN=MIDDLE  ALT=\"2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > mL of pure acid required </SPAN>\n" );
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