Pure water and pure salt are poor conductors of electricity. When salt is dissolved in water, the resulting solution conducts electricity well. Which statement explains why this occurs with these substances?(1 point)
Responses
The process of dissolving frees the electrons in the solution to move.
The process of dissolving frees the electrons in the solution to move.
The process of dissolving more closely binds the electrons in the solution.
The process of dissolving more closely binds the electrons in the solution.
The process of dissolving frees the atoms in the solution to move.
The process of dissolving frees the atoms in the solution to move.
The process of dissolving closely binds the ions in the solution.
Pure water and pure salt are poor conductors of electricity. When salt is dissolved in water, the resulting solution conducts electricity well. Which statement explains why this occurs with these substances?
~ The process of dissolving frees the electrons in the solution to move.
Which statement correctly describes the conductivity of the specified material?
~ Gold has high conductivity.
A person plugs a power cord into an electrical outlet in the wall. The power cord is covered in black rubber. Which statement is an accurate description of the materials?
~ Electrons would easily move through the person if there was no rubber around the wire.
Which statement describes a similarity between conductors and insulators?
~ They can both be used in an electric circuit.
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The correct statement is:
The process of dissolving frees the ions in the solution to move.
When salt (sodium chloride) is dissolved in water, it dissociates into its constituent ions: sodium ions (Na+) and chloride ions (Cl-). These ions are then dispersed throughout the water. In a solution, the ions are free to move around and carry an electric charge. This is because the polar water molecules surround and separate the ions, allowing them to move independently. Consequently, the solution becomes a good conductor of electricity.
Pure water, on the other hand, is a poor conductor of electricity because it has a low concentration of free ions. In pure water, only a small fraction of water molecules dissociate into hydrogen ions (H+) and hydroxide ions (OH-), which are responsible for conducting an electric charge. However, even this small concentration of ions is enough to make pure water a weak conductor.