How to Determine if Salt is Acidic, Basic, or Neutral Example, Problem, Shortcut, Explained Question

Dissociate NaCl into Na+ and Cl-. Cl- is from a strong acid (hydrochloric acid) and Na+ is a group 1A metal, making both ions neutral. Since both ions are neutral, NaCl is a neutral salt.

First, dissociate KCN into K+ and CN-. K+ is a group 1A metal ion, making it neutral. CN- is a negatively charged ion, which is basic. Since only a basic ion remains, KCN is a basic salt.

This video explains how to determine if a salt is acidic, basic, or neutral using a simple, step-by-step method. Five examples will be used to illustrate the process.

Dissociate ammonium acetate into NH4+ (acidic) and CH3COO- (basic). Since both acidic and basic ions are present, compare their Ka and Kb values. The Ka for NH4+ (derived from the Kb of NH3) is 5.56 x 10^-10. The Kb for CH3COO- (derived from the Ka of CH3COOH) is 5.56 x 10^-10. As Ka = Kb, the salt is neutral.

Dissociate C5H5NHF into C5H5NH+ (acidic) and F- (basic). The Ka for C5H5NH+ (derived from the Kb of C5H5N) is 5.56 x 10^-6. The Kb for F- (derived from the Ka of HF) is 1.47 x 10^-11. Since Ka (5.56 x 10^-6) is greater than Kb (1.47 x 10^-11), the salt is acidic.

The video summarizes the process, emphasizing the importance of calculating Ka and Kb for conjugates when direct values are unavailable. Viewers are encouraged to re-watch the video for clarity on Ka/Kb calculations and to visit the website for a free guide on acing chemistry.

Dissociate ammonium nitrate into NH4+ and NO3-. NO3- is part of a strong acid (nitric acid), so it's neutral. NH4+ is a positively charged ion, indicating it's acidic. Therefore, ammonium nitrate is an acidic salt.