Question

The concentrations of hydrogen ion in two solutions are (a).1×10-4moldm and (b).5×10-9moldm. What is the pH of each solutions?

Answer 1

Answer:

(a) pH=4.0

(b) pH=8.3

Explanation:

Hello there!

In this case, since the pH is understood as the potential of the hydrogen in an aqueous solution, and we can calculate it is as follows:

$pH=-log([H^+])$

We simply need to plug in the concentrations on each question as shown below:

(a)

$pH=-log(1x10^{-4})\\\\pH=4$

(b)

$pH=-log(5x10^{-9})\\\\pH=8.3$

Regards!