Question

What is the pH of a 2.0 × 10-4 M HCl solution?

Answer 1

Answer:

pH = 3.69

Explanation:

HCl is a strong acid. It will disscociates completely into dissoluted ions such that,

$[H^+]=2\times 10^{-4}\ M$

The formula for pH is given by :

$pH=-log[H^+]\\\\pH=-log(2\times 10^{-4})\\\\pH=3.69$

So, the pH of the solution is 3.69.

Answer 2

The answer to your question is 4.