Worked Examples : Deciding if an Electrolyte is Strong or WeakQuestion 1: Hydrochloric acid completely dissociates in water to form hydrogen ions and chloride ions. Show Solution: (Based on the StoPGoPS approach to problem solving.)
Question 2: Is an aqueous solution of sodium hydroxide a strong electrolyte or a weak electrolyte? Solution: (Based on the StoPGoPS approach to problem solving.)
Question 3: Sodium chloride completely dissociates in water to form sodium ions and chloride ions. Solution: (Based on the StoPGoPS approach to problem solving.)
Question 4: Acetic acid (ethanoic acid), CH3COOH, has a small acid dissociation constant (Ka = 1.8 × 10-5). Solution: (Based on the StoPGoPS approach to problem solving.)
1. Sulfuric acid is a polyprotic strong acid 2. Water molecules undergo self-dissociation to a
very small extent. Is acetic acid a strong electrolyte?We therefore make a distinction between strong electrolytes, such as sodium chloride, and acetic acid, which is an example of a weak electrolyte. As the name acetic acid suggests, this substance is also an acid, as well as a weak electrolyte. Accordingly, we classify acetic acid as a weak acid.
Why is acetic acid an electrolyte?Acetic acid is a weak acid and ammonia is a weak base which means that only a portion of the molecules will dissociate into ions, while some remain as molecules. This makes them weak electrolytes, and they will produce a dim light because of a smaller concentration of ions in solution.
Why are strong acid strong electrolytes?Strong and Weak Electrolytes
A strong electrolyte, like NaCl, splits up completely into sodium and chloride ions in solution. Likewise, a strong acid like HCl splits up completely into hydrogen and chloride ions in solution. Salts are often strong electrolytes, and strong acids are always strong electrolytes.
Why acetic acid is called weak electrolyte?It is a weak electrolyte because its ionization is very less.
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