In graphs, the independent variable is found on the
and the dependent variable is found
on

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Ответ:

jacky852

08.09.2021

Chemistry

HOCl , $K_a=2.0\times 10^{-8}$

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

Strong acids dissociate completely and thus, 0.5 M of a solution of a strong acid yields a pH of 1.0 .

The expression of the pH of the calculation of weak acid is:-

$pH=-log(\sqrt{k_a\times C})$

Where, C is the concentration = 0.5 M

Given, pH = 4.0

So, for HOCl , $K_a=2.0\times 10^{-8}$

$pH=-log(\sqrt{2.0\times 10^{-8}\times 0.5})$

pH = 4.0

Hence, the acid is HOCl.

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In graphs, the independent variable is found on the and the dependent variable is found on