document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1206562>Question 1206562</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When water is \"broken\" into ions, two basic ions are formed: the hydrogen ion (H+) and the hydroxide ion (OH-). (H₂O ⇒ H⁺ + OH⁻) The hydrogen ion is the acidic part and the hydroxide ion is the basic part. If a chemist knows the pH of a solution the concentration of that solution is calculated with the equation pH = -log[H+]. A pH = 7 is a neutral solution, a pH < 7 indicates an acidic solution and a pH > 7 indicates a basic solution. The square brackets around the symbol H+ is used in chemistry to mean \"the concentration of hydrogen ions\".\r<BR>\n" );
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document.write( "(a) The pH of tomatoes is 4. What is the hydrogen-ion concentration? \r<BR>\n" );
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document.write( "(b) The hydrogen-ion concentration of eggs is 3.16 x 10^-8 moles/litre. What is the pH of eggs? \r<BR>\n" );
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document.write( "(c) The product of the concentration of the hydrogen ion and of the hydroxide ion, [OH-], is 10^-14. Which is expressed in the equation [H+][OH-] = 10^-14. Calculate the pH of a solution with [OH-] = 10^-5 \r<BR>\n" );
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document.write( "(d) Calculate the [OH-] of a solution with a pH of 2. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #844117 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=844117\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -------------------------------------------------------<BR>\n" );
document.write( "(a) The pH of tomatoes is 4. What is the hydrogen-ion concentration?<BR>\n" );
document.write( "(b) The hydrogen-ion concentration of eggs is 3.16 x 10^-8 moles/litre. What is the pH of eggs?<BR>\n" );
document.write( "(c) The product of the concentration of the hydrogen ion and of the hydroxide ion, [OH-], is 10^-14. Which is expressed in the equation [H+][OH-] = 10^-14. Calculate the pH of a solution with [OH-] = 10^-5<BR>\n" );
document.write( "(d) Calculate the [OH-] of a solution with a pH of 2.<BR>\n" );
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document.write( "I will give help for part (c) only.\r<BR>\n" );
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document.write( "You understood [H+][OH-]=10^(-14).<BR>\n" );
document.write( "You are given a hydroxide concentration value and asked for pH.\r<BR>\n" );
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document.write( "[H+]*10^(-5)=10^(-14)\r<BR>\n" );
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document.write( "[H+]=10^(-14+5)\r<BR>\n" );
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document.write( "[H+]=10^(-9)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pH=9 ALIGN=MIDDLE  ALT=\"pH=9\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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