Which of the following is an example of a solution commonly found in everyday life?

• A. Oil and vinegar salad dressing
• B. Sand mixed with water
• C. Saltwater (NaCl dissolved in H2O)
• D. Iron filings in sand

Answer: (C)

Verified step by step guidance

1. Understand the definition of a solution: a homogeneous mixture where the solute is uniformly distributed within the solvent at the molecular or ionic level.
2. Analyze each option to determine if it fits the definition of a solution:
3. - Oil and vinegar salad dressing is a heterogeneous mixture (a suspension or emulsion) because oil and vinegar do not mix uniformly.
4. - Sand mixed with water is a heterogeneous mixture (a suspension) because sand particles do not dissolve and settle out.
5. - Saltwater (NaCl dissolved in H2O) is a homogeneous mixture where salt ions are evenly dispersed in water, making it a true solution.