3. Water

Introduction to Water

Importance of water for life | Chemistry of life | AP Biology | Khan Academy

 the achievement of a stable configuration by one atom of a bond but not by the other partner 

 No. The entire water molecule is stabilized by covalent bonds joining the oxygen to the two hydrogens. However, the bonds are polar covalent, resulting in a polar molecule. 

 No. Consider the nature of the covalent bonds found within a water molecule. 

 No. However, the partial charges on a water molecule contribute to its ability to dissociate. 

 the unequal sharing of electrons between the hydrogen and the oxygen atoms of a water molecule 

Consider the electronegativity of the component atoms of a water molecule.

The partial charges on a water molecule occur because of __________.

Properties of Water

Animation: Dissociation of Water Molecules

Structure Of Water Molecule - Chemistry Of Water - Properties Of Water - Composition Of Water

 The temperature of living things tends to change relatively slowly. 

 No. This statement is true, but there is a better answer. 

 A variety of nutrient molecules is readily available as dissolved solutes. 

 Waste products produced by cell metabolism can be easily removed. 

 All of the listed responses are correct. 

Consider the emergent properties of water.

Cells are surrounded by water, with which they are mostly filled. Which of the following occurs as a result?

Properties of Water | Polarity | Hydrogen Bonds | Adhesion & Cohesion

 Two hydrogen atoms in different water molecules 

 No. Two hydrogen atoms would have the same electronegativity. 

 The oxygen atoms in different water molecules 

 No. Two oxygen atoms would have the same electronegativity. 

 The hydrogen atoms in a single water molecule 

 The oxygen atom in one water molecule and a hydrogen atom in another water molecule 

Consider the partial charges that are established by the electronegative nature of the oxygen atom in each molecule.

In a group of water molecules, hydrogen bonds form between which of the following?

Water                   .
a. is a good solute;
b. facilitates chemical reactions;
c. serves as an enzyme;
d. makes strong covalent bonds with other molecules;
e. consists of two oxygen and one hydrogen atoms

Introduction to Water Example 1

The emergent properties of water (cohesion, high heat capacity, good solvent) come from the fact that water is ______ and ______ hydrogen bond.a) Polar, can.b) Polar, cannot.c) Non-polar, can.d) Non-polar, cannot.

Animation: Polarity of Water

Why Does Life Need Water?

 That water molecules are linear, like a pole 

 No. Remember that water molecules are shaped somewhat like a wide V. 

 That water is one of the many hydrophobic molecules 

 No. Hydrophobic molecules are nonpolar and do not mix with water. 

 That the atoms in water have equal electronegativities 

 No. When equally electronegative atoms bond, the electrons are shared equally between them, forming a nonpolar bond. 

 That atoms in the molecule have partial charges as a result of unequal sharing of electrons in a covalent bond 

What are the characteristics of a polar molecule with respect to partial charges?

Water is a polar molecule. What does this statement mean?

Which of the following is not a function of water?
a. dispersing nutrients throughout the body;
b. helping prevent cancer;
c. helping to regulate body temperature;
d. helping to regulate blood pressure

Emergent Properties of Water

Individual water molecules bind to each other through:a) Covalent bonds.b) &nbsp; Ionic bonds.c) &nbsp; Hydrogen bonds.d) &nbsp; Hydrophobic bonds.

How polarity makes water behave strangely - Christina Kleinberg

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Properties of Water- Thermal

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