Question

For an aqueous solution of hydrochloric acid (HCl) the pH was found to be 4.18 units. What is the concentration of HCl in this solution?

Answer 1

Answer:

Answer is 0.000066072M

Explanation:

antilog of 4.18=1/[H+]

[H+] = 0.000066072M

Answer 2

Answer:

The concentration of HCl in the solution is 6.6×10⁻⁵N.

Explanation:

• The molar concentration of hydrogen ions is gauged by a solution's pH. It is described as the hydrogen ion concentration's negative logarithm.

• The relationship between pH and concentration of the hydrochloric acid is given as,

                              $\mathrm{pH=-log[H^{+}]}$                      (1)

Where,

pH= Potential of Hydrogen

[H⁺]=hydrogen ion concentration

In question, the pH of the solution is given as 4.18.

By inserting the value in equation (1) we get;

$\mathrm{4.18=-log[H^{+}]}$

$\mathrm{[H^{+}]=antilog(-4.18)}$

$\mathrm{[H^{+}]=6.6\times 10^{-5}\ N}$

So, the concentration of HCl in the solution is 6.6×10⁻⁵N.

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