document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1024455>Question 1024455</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please Help../ Thanks show steps\r<BR>\n" );
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document.write( "The pH scale for acidity is defined by pH=&#8722;log10[H+] where [H+] is the concentration of hydrogen ions measured in moles per liter (M). \r<BR>\n" );
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document.write( " (A) The pH of human blood is 7.4. Calculate the concentration of hydrogen ions in moles per liter (M). \r<BR>\n" );
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document.write( "[H+]=      M\r<BR>\n" );
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document.write( " (B) The pH of lemon juice is 2.0. Calculate the concentration of hydrogen ions in moles per liter (M). \r<BR>\n" );
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document.write( "[H+]=    M\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #639914 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=639914\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We use the definition of logarithms for A and B<BR>\n" );
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document.write( "A) 7.4 = -log (base 10) H+<BR>\n" );
document.write( "note multiply both sides of = by -<BR>\n" );
document.write( "-7.4 = log (base 10) H+<BR>\n" );
document.write( "H+ = 10^-(7.4)<BR>\n" );
document.write( "H+ = 0.00000004 moles per liter<BR>\n" );
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document.write( "B) 2 = -log (base 10) H+<BR>\n" );
document.write( "-2 = log (base 10) H+<BR>\n" );
document.write( "H+ = 10^-2<BR>\n" );
document.write( "H+ =  0.01 moles per liter<BR>\n" );
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