Respuesta :
The solution containing one mole per [tex]dm^{3}[/tex] of Hydrochloric acid will show the lowest pH, as the concentration of hydrogen ions produced by the dissociation is higher for Hydrochloric acid.
pH of the solution can be calculated as a measure of the concentration of the hydrogen ions [tex][H^{+}][/tex] present in it.
[tex]pH=-log [H^{+}][/tex]
- Hydrochloric acid is a strong acid and hence, dissociates completely in to [tex]H^{+}[/tex] and [tex]Cl^{-}[/tex] ions.
- The higher the concentration of hydrogen ions lower will be the pH value of the solution.
- Ethanoic acid is a weak acid and hence dissociates less readily than hydrochloric acid. This can lead to a higher pH.
- The dissociation of Sodium chloride will not lead to the production of any hydrogen ions. And hence, the pH will be high (around [tex]7[/tex])
- Sodium hydrogen carbonate will dissociate in to sodium ions[tex](Na^{+} )[/tex] and bicarbonate ions [tex](HCO_{3} ^{-} )[/tex]. And hence, the pH will be high (around [tex]8.3[/tex]).
Among the solution containing one mole per [tex]dm^{3}[/tex] of these four compounds, the hydrogen ion concentration will be higher for Hydrochloric acid.
Thus, we can say that the correct answer is Hydrochloric acid.
Learn more about Acid dissociation here:
https://brainly.com/question/16510027
