Question #cc892

1 Answer
May 1, 2016

Answer:

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

Explanation:

pH is defined as;

#pH=-log[H^+]#

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

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

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

So the answer is D.