Properties of Water

What is a buffer?

A substance that resists change in pH

In reference to water, what do cohesion, surface tension, and adhesion all have in common?

All are properties related to hydrogen bonding

As pH.... , [H+]....

As pH increases, [H+] decreases and As pH decreases, [H+] increases

On a hot summer day, a fish in a shallow pond does not experience a spike in temperature and does not lose its habitat to evaporation. What properties of water are at work to provide these protections?

High heat capacity and high heat of vaporization

The property of water that contributes to its ability to stick to certain surfaces is called

adhesion

Which property or properties of water is/are most important for water transport in plants?

adhesion and cohesion

How does the water on Earth regulate the Earth's temperature?

It absorbs heat, but only increases a few degrees in temp.

How does water act in most solutions?

It is a universal solvent, dissolving mostly ionic or polar covalent substances

Which property of water can be used to explain why it is able to dissolve many substances?

Polar structure

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

The insects are light enough so they do not break the hydrogen bonds holding the water molecules together

What causes water's high heat capacity?

cohesion

What property of water allows it to have a very high boiling point?

cohesion

Which of the following would be the strongest type of bond present in a sample of water?

covalent bonds

The bond between two H2O molecules is called,

hydrogen bonds

Water's ability to create intermolecular hydrogen bonds results in its inability to break up which of the following compounds?

lipid

Which phase of water in the most dense

liquid

In a single molecule of water, the two hydrogen atoms are bonded to the oxygen atom by

polar covalent bonds