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, when dissolved in water or melted, dissociates into ions, which are charged particles. This process is a chemical change because it involves the breaking of bonds between the atoms or molecules of the electrolyte and the formation of new ionic bonds. Here’s why:
- Nature of Electrolytes:
Electrolytes are typically salts, acids, or bases that contain positive (cations) and negative (anions) ions. When these substances dissolve in water, they dissociate into their constituent ions. For example, when sodium chloride (NaCl) dissolves in water, it dissociates into Na⁺ and Cl⁻ ions. This dissociation is not just a physical separation; it is a chemical reaction because the original ionic bonds between Na and Cl atoms are broken, and new interactions occur between these ions and water molecules. - Physical vs. Chemical Change:
- Physical change refers to a change in state or appearance without altering the chemical composition of the substance. For example, dissolving sugar in water is a physical change because the sugar molecules remain intact and do not undergo any chemical transformation.
- Chemical change, on the other hand, involves a transformation in the chemical composition of the substance. In the case of electrolytes, the dissociation involves breaking bonds between atoms or molecules to form new ions, making it a chemical change.
- Spontaneous Change:
Electrolytes can undergo dissociation spontaneously in certain conditions (such as when they are dissolved in water), but this spontaneity does not change the fact that it is a chemical change. The dissolution is driven by the interaction of the electrolyte with the solvent, typically water, and the resulting ion formation is a chemical process. - Dependence on the Substance:
Not all substances undergo dissociation into ions. Some compounds may dissolve but not dissociate, or they may not dissolve at all. However, for those substances that do dissociate into ions, the process is always a chemical change.
In summary, when an electrolyte dissolves in water or melts and dissociates into ions, it undergoes a chemical change because the original structure of the compound is broken apart, and new ions are formed.