Ammonium (NH₄⁺) has a pKa of 9.3.Select the majority species at pH = 10

Question

Quizplus · Accepted Answer

At pH 10, the solution is basic and has a high concentration of hydroxide ions (OH-). Ammonium ion, NH4+, can react with OH- to form the base, ammonia (NH3), and water (H2O). NH4+ is an acid and will donate a proton to OH- to form water. As the pH is greater than the pKa, so Ammonium ion (NH4+) will have deprotonated and the majority species will be ammonia (NH3). The correct choice is C as it represents the deprotonated form of Ammonium ion (NH4+).

Ammonium (NH4+) Has a PKa of 9

Ammonium (NH₄⁺) Has a PKa of 9