Strong Electrolytes:

• NaCl: Sodium chloride is a strong electrolyte because it dissociates completely into sodium ions (Na+) and chloride ions (Cl-) in solution. These ions are free to conduct electricity, making NaCl a strong electrolyte.

• KNO3: Potassium nitrate is also a strong electrolyte as it dissociates completely into potassium ions (K+) and nitrate ions (NO3-) in solution. These ions facilitate the conduction of electricity, making KNO3 a strong electrolyte.

Weak Electrolytes:

• NH4OH: Ammonium hydroxide is a weak electrolyte because it only partially dissociates into ammonium ions (NH4+) and hydroxide ions (OH-) in solution. This partial dissociation results in a lower concentration of ions available for conducting electricity compared to strong electrolytes.

• FeSO4: Iron(II) sulfate is also a weak electrolyte as it only partially dissociates into iron(II) ions (Fe2+) and sulfate ions (SO4^2-) in solution. The incomplete dissociation limits the concentration of ions available for conducting electricity, making FeSO4 a weak electrolyte.

In summary, NaCl and KNO3 are strong electrolytes because they completely dissociate into ions in solution, allowing for efficient conduction of electricity. On the other hand, NH4OH and FeSO4 are weak electrolytes because they only partially dissociate, resulting in a lower concentration of ions available for conducting electricity.