AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What makes water a universal solvent?
A
It is a polar molecule that can form hydrogen bonds, allowing it to dissolve many substances.
B
It is a nonpolar molecule that can form hydrogen bonds, allowing it to dissolve many substances.
C
It is a polar molecule with a low specific heat, allowing it to dissolve many substances.
D
It is a nonpolar molecule with a low specific heat, allowing it to dissolve many substances.
Explanation: 

Detailed explanation-1: -Because of its polarity and ability to form hydrogen bonds, water makes an excellent solvent, meaning that it can dissolve many different kinds of molecules.

Detailed explanation-2: -Water is called the “universal solvent” because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.

Detailed explanation-3: -Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.

Detailed explanation-4: -Water is called a ‘universal solvent’ because water can dissolve much more substances than any other liquid found in nature but water cannot dissolve every substance. For example-water cannot dissolve fats, waxes, and hydroxides due to the low solubility of oppositely charged particles.

Detailed explanation-5: -The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles-a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.

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