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Multiple Choice
Water is a very versatile solvent because water molecules are __________.
A
nonpolar
B
ionic
C
hydrophobic
D
polar
Verified step by step guidance
1
Understand the concept of polarity: Polarity refers to the distribution of electrical charge over the atoms joined by the bond. In polar molecules, there is an uneven distribution of electron density.
Recognize the structure of a water molecule: A water molecule (H₂O) consists of two hydrogen atoms covalently bonded to one oxygen atom. The oxygen atom is more electronegative than the hydrogen atoms, meaning it attracts the shared electrons more strongly.
Identify the polar nature of water: Due to the difference in electronegativity between oxygen and hydrogen, the electrons are pulled closer to the oxygen atom, creating a partial negative charge near the oxygen and a partial positive charge near the hydrogen atoms.
Relate polarity to solvent properties: The polar nature of water allows it to interact with various substances, dissolving ionic compounds and other polar molecules effectively. This is because the positive and negative ends of the water molecule can surround and separate the ions or polar molecules.
Conclude why water is a versatile solvent: The ability of water to dissolve a wide range of substances is due to its polar nature, making it an excellent solvent for biological processes.