A student prepares 0.5 M solution each of hydrochloric and ethanoic acids and then measured pH. The result would show that the?
A weak acid would have a higher pH value than a strong acid at the same concentration. Strong acids dissociate completely in water, releasing more hydrogen ions (H\(^+\) and thus having a lower pH (more acidic). Weak acids only partially dissociate, resulting in fewer H\(^+\) ions and a higher pH (less acidic).
HCl is a strong acid because it dissociates completely when dissolved in water, thereby releasing more hydrogen ions and thus having a lower pH value when compared to ethanoic acid, a weak acid which dissociates partially when dissolved in water, thereby releasing less hydrogen ions, invariably having a higher pH, regardless of the fact that both acids have the same concentration of 0.5M.
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