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 of increasing pH is: HNO3 < NH4Cl < KCl < NaC2H3O2 < KOH. This is because the pH of a solution is determined by the concentration of H+ ions in the solution. The higher the concentration of H+ ions, the lower the pH. The Ka value for an acid is a measure of its strength. The lower the Ka value, the stronger the acid. HNO3 is a strong acid, so it has a low Ka value and a low pH. NH4Cl is a weak acid, so it has a higher Ka value and 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 of all the solutions.

In Which of the Following Are the Species Listed in Order