28. Which of the following properties of water explains its solvent abilities for certain substances?
Answer: B
Polarity explains water's solvent abilities for certain substances.
Water's polarity allows it to interact with various substances, making it an effective solvent for many ionic and polar compounds.
A) High specific heat
High specific heat refers to water's ability to absorb and retain heat without a significant change in temperature. While this property is important for regulating climate and biological processes, it does not directly relate to water's ability to dissolve substances.
B) Polarity
Polarity is the correct choice as it describes the distribution of electrical charge in water molecules. The positive and negative ends of water molecules allow them to surround and interact with other polar or ionic substances, effectively breaking them apart and dissolving them.
C) Volume
Volume pertains to the amount of space that water occupies and does not influence its capacity to act as a solvent. This property is not relevant to the interactions between water and other substances.
D) High surface tension
High surface tension is a result of the cohesive forces between water molecules, which allows it to resist external force. Although this property affects how water interacts with its environment, it does not explain its solvent abilities.
Conclusion
Polarity is the defining characteristic that enables water to dissolve various substances, making it a universal solvent. The other options, while significant in their own contexts, do not contribute to the solvent capabilities of water in the same way that polarity does. Understanding the role of polarity is essential in comprehending why water is such an effective solvent.