Which statement is not true about pure water? A. It has a pH of 7.0 . B. It is composed of polar

step 1 Pure Water. Pure Water has an equal number of hydrogen ions to hydroxyl ions, and this gives it

Which statement is not true about pure water? A. It has a pH...

Key Concepts

pH Scale

The pH scale is a measure of how acidic or basic a solution is, ranging from 0 to 14, with 7 being neutral. In the context of pure water, a pH of 7 indicates that it is neither acidic nor basic, reflecting the equal concentration of hydrogen ions (H?) and hydroxide ions (OH?).

Molecular Polarity

Molecular polarity refers to the distribution of electrical charge over the atoms in a molecule, leading to an overall dipole moment. Water is a classic example of a polar molecule due to its bent molecular shape and the electronegativity difference between oxygen and hydrogen atoms, which results in a partial negative charge on the oxygen and partial positive charges on the hydrogens.

Bond Types in Molecules

Bond types in molecules include covalent and ionic bonds. Covalent bonds involve the sharing of electrons between atoms, as seen in water where hydrogen and oxygen share electrons. In contrast, ionic bonds are formed from electrostatic attractions between oppositely charged ions. Understanding the distinction between these bonding types is crucial since water molecules are held together by covalent bonds, not ionic bonds.

Solvent Properties

Solvent properties refer to a substance’s ability to dissolve other substances, resulting in a solution. Water is known as the 'universal solvent' because of its exceptional ability to dissolve a wide variety of compounds, which can be attributed largely to its polarity and hydrogen bonding capabilities.

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