Definition of Solution:
A solution is a homogeneous mixture composed of two or more substances that are uniformly distributed at a molecular level. In a solution, the solute is the substance that is dissolved, while the solvent is the substance in which the solute is dissolved.
Explanation of the Correct Answer:
Homogeneous Mixture:
- A homogeneous mixture is one that has uniform composition and properties throughout.
- In a solution, the solute particles are evenly dispersed in the solvent, resulting in a uniform appearance.
- This uniform distribution at a molecular level is a characteristic of solutions, making them homogeneous mixtures.
Comparison with Other Options:
Heterogeneous Mixture:
- A heterogeneous mixture has non-uniform composition and properties, with visible differences between its components.
- Solutions, on the other hand, are homogeneous mixtures and do not exhibit these visible differences.
Compound of Two Elements:
- A compound is a substance formed by the chemical combination of two or more elements in fixed proportions.
- Solutions do not involve chemical reactions between the solute and solvent; instead, they are simply mixtures of substances.
Compound of More Than Two Elements:
- While compounds can be formed from more than two elements, solutions are not compounds but mixtures.
- Solutions can contain multiple substances dissolved in a solvent, making them different from compounds.
Conclusion:
In conclusion, a solution is correctly defined as a homogeneous mixture because of its uniform composition and distribution of solute particles within a solvent. This characteristic distinguishes solutions from heterogeneous mixtures, compounds, and compounds of more than two elements.