In-Depth Summary of Activity 11.4
In Activity 11.4, students test whether distilled water can conduct electricity and observe that it does not. However, upon dissolving a pinch of salt in it, the water becomes conductive, demonstrating that the presence of ions enhances conductivity. This highlights the distinction between good and poor conductors of electricity, notably that distilled water is a poor conductor due to its lack of dissolved minerals, while saltwater acts as a good conductor due to the ionic dissociation of salt in water. Furthermore, the section emphasizes the significance of understanding how electric current interacts with different materials, leading to chemical reactions that can produce gases and deposits of metals when direct current passes through conductive solutions.