An electrolyte will yield ions by undergoing a:
Select the correct answer below:
physical change
chemical change
spontaneous change
depends on the substance
The correct answer and explanation is :
The correct answer is chemical change.
Explanation:
An electrolyte is a substance that dissociates into ions when dissolved in water or when melted, and this dissociation occurs through a chemical change. The process involves the breaking of chemical bonds within the electrolyte, resulting in the formation of ions, which are charged particles. This is not simply a physical separation or a phase change, but a transformation at the molecular level where new particles (ions) are formed. Let’s break this down in more detail:
- Chemical Change: A chemical change refers to a process where the chemical structure of a substance is altered, and new substances are formed. For example, when an ionic compound like sodium chloride (NaCl) is dissolved in water, the NaCl dissociates into Na⁺ and Cl⁻ ions. This dissociation represents a chemical change because the ions are now in a different chemical form than the solid NaCl from which they originated.
- Ion Formation: For an electrolyte to yield ions, it must undergo a transformation at the atomic or molecular level. In the case of salts, acids, and bases (common electrolytes), their molecules break apart into positively charged ions (cations) and negatively charged ions (anions). This is a chemical reaction because the bonds between the atoms of the electrolyte must be broken and new ions are formed.
- Physical Change: A physical change would only involve a change in the state of matter (e.g., solid to liquid, liquid to gas) without altering the substance’s chemical composition. Since the formation of ions changes the chemical identity of the substance (such as NaCl turning into Na⁺ and Cl⁻), this process is not just physical but chemical.
- Spontaneous Change: While the dissociation of an electrolyte can sometimes happen spontaneously (e.g., when dissolving in water), it is the result of a chemical change rather than a simple spontaneous shift without a chemical transformation.
In summary, the process where an electrolyte yields ions occurs due to a chemical change because it involves the breaking and forming of chemical bonds, leading to the creation of ions.