document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=211020>Question 211020</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the pH of an acidic substance of your choice. Using this pH, show how to find the hydrogen ion concentration, [H+], of the substance using the formula. Discuss the meaning of pH and [H+], the pH scale and why your chosen substance is acidic. Use scientific notation or enough decimal places so that your answer has at least 3 place values. For example, either use 3.44*10-6 or 0.00000344.\r<BR>\n" );
document.write( "\n" );
document.write( "I picked Baking soda. Baking soda is NaHCO3.  <BR>\n" );
document.write( "The formula is:<BR>\n" );
document.write( "pH = -log10 [H+] <BR>\n" );
document.write( "Baking soda has a pH of 9. It is a base, since the pH is above 7. \r<BR>\n" );
document.write( "\n" );
document.write( "You first plug 9 into the formula: \r<BR>\n" );
document.write( "\n" );
document.write( "9 = -log10 [H+] \r<BR>\n" );
document.write( "\n" );
document.write( "Then divide by -1: \r<BR>\n" );
document.write( "\n" );
document.write( "-9 = log10 [H+] \r<BR>\n" );
document.write( "\n" );
document.write( "Take 10 on each side: \r<BR>\n" );
document.write( "\n" );
document.write( "10^-9 = 10log10 [H+] \r<BR>\n" );
document.write( "\n" );
document.write( "Simplify: <BR>\n" );
document.write( "10^-9 = [H+] <BR>\n" );
document.write( "[H+] = 10^-9 mol/L <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #159413 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=159413\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the pH of an acidic substance of your choice. Using this pH, show how to find the hydrogen ion concentration, [H+], of the substance using the formula. Discuss the meaning of pH and [H+], the pH scale and why your chosen substance is acidic. Use scientific notation or enough decimal places so that your answer has at least 3 place values. For example, either use 3.44*10-6 or 0.00000344. <BR>\n" );
document.write( "I picked Baking soda. Baking soda is NaHCO3. <BR>\n" );
document.write( "The formula is:<BR>\n" );
document.write( "pH = -log10 [H+] <BR>\n" );
document.write( "Baking soda has a pH of 9. It is a base, since the pH is above 7. <BR>\n" );
document.write( "You first plug 9 into the formula: <BR>\n" );
document.write( "9 = -log10 [H+] <BR>\n" );
document.write( "Then divide by -1: <BR>\n" );
document.write( "-9 = log10 [H+] <BR>\n" );
document.write( "Take 10 on each side: <BR>\n" );
document.write( "10^-9 = 10log10 [H+] <BR>\n" );
document.write( "Simplify: <BR>\n" );
document.write( "10^-9 = [H+] <BR>\n" );
document.write( "[H+] = 10^-9 mol/L <BR>\n" );
document.write( "[H+} = 0.000000001 mol/L<BR>\n" );
document.write( "===============================<BR>\n" );
document.write( "Comment: <BR>\n" );
document.write( "Your work looks good to me.<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" );