Answer:
pH=3.40
Explanation:
For this question, we can start with the general ionization reaction of a general acid:
[tex]HA~<->~A^-~+~H^+[/tex]
The acids can produce the hydronium ion ([tex]H^+[/tex]). If we can to calculate the pH we have to use the equation:
[tex]pH=-Log[H^+][/tex]
So, if we want to calculate the pH value we have to know the concentration of the hydronium ion. For this, we can check the percentage of ionization. If we have 0.2 % of ionization, we will have only 0.2 % of hydronium ions from the initial concentration. In other words, we can calculate the concentration of [tex]H^+[/tex], if we do the 0.2% of the initial concentration, so:
[tex]0.2~M*\frac{0.2}{100}~=~0.0004~M[/tex]
With the concentration we can calculate the pH:
[tex]pH=-Log[0.0004~M]~=~3.40[/tex]
The pH value is 3.40
I hope it helps!
