What is a characteristic of a weak electrolyte? • it does not dissociate or ionize in water
•it partially dissociates or ionizes in water
•it does not conduct electricity
• it easily conducts electricity

It partially dissociates or ionizes in water

for example:

SO₂·H₂O + H₂O ⇄ HSO₃⁻ + H₃O⁺
HSO₃⁻ + H₂O ⇄ SO₃²⁻ + H₃O⁺

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na