document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=688046>Question 688046</A>: <I><SPAN STYLE=\"word-break: break-all;\">  a chemist has 40 grams of 25% sulfuric acid solution. how much pure sulfuric acid  must she add to get a solution which is 30% sulfuric acid. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #425482 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=425482\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a chemist has 40 grams of 25% sulfuric acid solution. how much pure sulfuric acid must she add to get a solution which is 30% sulfuric acid.<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.25*40 + 1*x = 0.30(40+x)<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "25*40 + 100x = 30*40 + 30x<BR>\n" );
document.write( "70x = 5*40<BR>\n" );
document.write( "x = 200/70<BR>\n" );
document.write( "x = 2.857 grams (amt. of pure acid to add)<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" );