Chemistry · Ionic equilibrium: Weak and strong electrolytes, ionization of electrolytes
Identify the pair of electrolytes in which, one contains only ions and the other
Identify the pair of electrolytes in which, one contains only ions and the other contains unionized molecules in addition to ions respectively.
- A. Potassium hydroxide, nitric acid
- B. Carbonic acid, potassium chloride
- C. Sodium hydroxide, carbonic acid
- D. Barium sulphate, acetic acid
Step-by-step solution
Sodium hydroxide (NaOH) is a strong electrolyte, completely dissociating into Na+ and OH- ions in solution. Carbonic acid (H2CO3) is a weak electrolyte, partially dissociating into H+, HCO3-, and CO3^2- ions, and thus contains unionized molecules in addition to ions. The pair matches the description where the first (NaOH) contains only ions and the second (H2CO3) contains unionized molecules in addition to ions.
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