Answer :
I believe the correct answer from the choices listed above is the first option It would be pH value of 2 that will have the most acidic strength. The pH range is from 1 to 14 where one is the most acidic and 14 is the most basic so that it should be pH 2 the correct answer.
Answer: pH = 2
Explanation: pH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]pH=log\frac {1}{H^+}[/tex]
Thus as pH and [tex]H^+[/tex] are inversely related, a solution having lower pH will have more amount of [tex]H^+[/tex] concentration. And a solution having more pH will have less amount of [tex]H^+[/tex] concentration.
Acids have pH ranging from 1 to 6.9 , neutral solutions have pH of 7 and bases have pH ranging from 7.1 to 14.
Strong acids which dissociate completely when dissolved in water and have high concentration of [tex]H^+[/tex] will have low pH and vice versa.