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Question #cc892

1 Answer

May 1, 2016

The question you pose bears no relation to the one in the graphic for which the answer is D.

Explanation:

pH is defined as;

$p H = - log [H^{+}]$ $pH=-log[H^+]$

This means that in coffee $[H^{+}] = 10^{- 5} mol/l$ $[H^+]=10^(-5)" ""mol/l"$

and in tap water $[H^{+}] = 10^{- 8} mol/l$ $[H^+]=10^(-8)" ""mol/l"$

So you can see that the $H^{+}$ $H^+$ ion concentration in coffee is greater by a factor of $10^{3}$ $10^3$ or 1000 compared to tap water.

So the answer is D.

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