Problem 4-12

This is a stupid question from the book... Sorry!

The bulb glows due to the presence of ions in the solution. These are “charge carriers” completing the electrical circuit.

If Ba(NO₃)₂ is added, it will precipitate the SO₄^2- ions. However, each sulfate ion will be replaced by two nitrate ions (2 charge carriers). The lightbulb will not dim. In fact, it is the opposite.

None of the dilute salt solution proposed in this question will help reduce the intensity of the lightbulb...