document.write( "Question 415314: The pH of a substance equals –log[H+] where [H+] is the concentration of hydrogen ions. [H+] for tomato juice is 10^-4. What is the pH of tomato juice?
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Algebra.Com's Answer #291214 by jsmallt9(3758) $\"\"$ $\"About$

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Inserting $\"10%5E%28-4%29\"$ into the pH formula we get:
\n" ); document.write( " $\"-log%28%2810%5E%28-4%29%29%29\"$
\n" ); document.write( "Now we can use a property of logarithms, $\"log%28a%2C+%28p%5Eq%29%29+=+q%2Alog%28a%2C+%28p%29%29\"$ , to move the exponent of the argument out in front:
\n" ); document.write( " $\"-%28-4%29log%28%2810%29%29\"$
\n" ); document.write( "Since log(10) = 1 by definition this becomes:
\n" ); document.write( "-(-4)(1)
\n" ); document.write( "which simplifies to:
\n" ); document.write( "4
\n" ); document.write( "The pH of the tomato juice is 4. \n" ); document.write( "

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