document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=638369>Question 638369</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemistry experiment calls for 20% solution of copper sulfate. Kim has 28<BR>\n" );
document.write( "milliliters of 25% solution. How many milliliters of 10% solution should she<BR>\n" );
document.write( "add to obtain the required 20% solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #402165 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=402165\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A chemistry experiment calls for 20% solution of copper sulfate. Kim has 28<BR>\n" );
document.write( "milliliters of 25% solution. How many milliliters of 10% solution should she<BR>\n" );
document.write( "add to obtain the required 20% solution?<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "sulfate + sulfate = sulfate<BR>\n" );
document.write( "0.25*28 + 0.10x = 0.20(28+x)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "25*28 + 10x = 20*28 + 20x<BR>\n" );
document.write( "10x = 5*28<BR>\n" );
document.write( "x = 14 ml (amt. of 10% solutioin needed)<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );