Question

HX HY HZ 2. Use the illustration of the three acids (HX, HY and HZ) above to answer the following questions: Which of the acids is a strong acid and why? i. а. HХ b. HY c. HZ Which of the acids will have the highest pH and why? а. HX b. HY ii c. HZ li. Which of the acids will have the smallest dissociation constant Ka? а. НХ b. HY c. HZ 2.

Answer 1

(i) HY is the strongest acid out of all these three acids.

Because the dissociation of HY is highest. After dissociation HY acids dissociates into ions H+ and Y-.

(ii)All these 3 acids have H+ ions.

pH is defined as the negative logarithm of H+ ions.

Greater is the concentration of H+ ions, lesser is the pH and higher is the acidity.

As HX have only 2 H+ ions, thus lesser H+ concentration and highest pH. Thus HX is the answer.

(iii)HX has the smallest dissociation constant. As it dissociates into ions very less. Only 2 molecules dissociate into its ions thus, least dissociation constant for HX.