In experiments measuring the conductivity of aqueous solutions, the solutions that normally conduct electricity best are those that contain a high concentration of ions. Typically, strong electrolytes such as strong acids, strong bases, and soluble salts will dissociate completely in water, producing a greater number of ions compared to weak electrolytes, which partially dissociate.
To determine which solution would cause the bulb to glow the brightest, we would look for a solution that is:
- A strong electrolyte (it completely dissociates into its constituent ions).
- In a high concentration to maximize the number of ions in solution.
Common examples of strong electrolytes include:
- Sodium chloride (NaCl)
- Potassium nitrate (KNO3)
- Hydrochloric acid (HCl)
- Sulfuric acid (H2SO4)
Given a selection of various aqueous solutions, the solution that is a strong acid or a highly soluble ionic compound in high concentration would generally produce the brightest glow due to maximum ion concentration, hence the highest conductivity.
Without specific options from your table, it’s impossible to give a definitive answer, but the solution expected to result in the brightest glow of the bulb is most likely a strong electrolyte, especially if it’s an acid, like hydrochloric acid or a highly soluble salt, like sodium chloride.