document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=508935>Question 508935</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A lab tech has one solution that is 45% acid and another that is 70 % acid.  How much of each is needed to make 100 mL of a 65% 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 #341173 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=341173\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A lab tech has one solution that is 45% acid and another that is 70 % acid. <BR>\n" );
document.write( "How much of each is needed to make 100 mL of a 65% acid solution?<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.45x + 0.70(100-x) = 0.65*100<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "45x + 70*100 - 70x = 65*100<BR>\n" );
document.write( "5*100 = 25x<BR>\n" );
document.write( "x = 20 mL (amt of 45% solution needed)<BR>\n" );
document.write( "100-x = 80 mL (amt of 70% solution needed)<BR>\n" );
document.write( "============================================<BR>\n" );
document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=================<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );