Question

Question #cc892

Answer 1

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.