Question

question 4

how does hydrogen bonding support the special properties of water, cohesion and adhesion?

the hydrogen bonds create a weak bond between the individual water molecules but allow water to easily slide off surfaces.

the hydrogen bonds create a weak bond between the surface and the water molecules but do not allow for bonding between the individual water molecules.

the hydrogen bonds bond the individual hydrogen molecules together allowing them to escape as a gas.

the hydrogen bonds create a weak bond between the individual water molecules allowing for cohesion and between the water molecules and a surface.

Explanation:

Define cohesion and adhesion

Cohesion is the attraction between like molecules, such as water molecules binding to each other. Adhesion is the attraction between unlike molecules, such as water molecules binding to a surface.

Analyze the role of hydrogen bonds

Using the Water Polarity knowledge point, water molecules are polar, which allows them to form hydrogen bonds. These hydrogen bonds form both between individual water molecules (mediating cohesion) and between water molecules and other polar surfaces (mediating adhesion).

Evaluate the given options

• Option 1: Focuses only on sliding off surfaces, which does not explain adhesion.
• Option 2: Incorrectly states that hydrogen bonds do not allow bonding between individual water molecules.
• Option 3: Incorrectly states that hydrogen bonds bind individual hydrogen molecules together.
• Option 4: Correctly states that hydrogen bonds create weak bonds between individual water molecules (cohesion) and between water molecules and a surface (adhesion).

Answer:

• The hydrogen bonds create a weak bond between the individual water molecules but allow water to easily slide off surfaces.
• The hydrogen bonds create a weak bond between the surface and the water molecules but do not allow for bonding between the individual water molecules.
• The hydrogen bonds bond the individual hydrogen molecules together allowing them to escape as a gas.
• The hydrogen bonds create a weak bond between the individual water molecules allowing for cohesion and between the water molecules and a surface. (Correct answer)