In which of the following are the species listed in order of increasing pH? (K_a for HC₂H₃O₂ is 1.80 * 10^-⁵, and K_a for NH₄⁺ is 5.56 *10^-¹⁰). A) HNO₃, NH₄Cl, KCl, NaC₂H₃O₂, KOH B) NH₄Cl, HNO₃, KCl, KOH, NaC₂H₃O₂ C) KCl, NH₄Cl, HNO₃, KOH, NaC₂H₃O₂ D) HNO₃, KCl, NH₄Cl, KOH, NaC₂H₃O₂ E) none of these

Question

Quizplus · Accepted Answer

The correct order is HNO3 > NH4Cl > KCl > NaC2H3O2 > KOH. HNO3 is a strong acid, so it has the lowest pH. NH4Cl is a weak acid, so it has a higher pH than HNO3. KCl is a neutral salt, so it has a pH of 7. NaC2H3O2 is a weak base, so it has a higher pH than KCl. KOH is a strong base, so it has the highest pH.

In Which of the Following Are the Species Listed in Order