AP Biology: Properties of Water

hydrogen bonds.

nonpolar covalent bonds

polar covalent bonds.

ionic bonds.

van der Waals interactions

a covalent bond

a hydrogen bond

an ionic bond

a hydrophilic bond

a hydrophobic bond

Lakes don't freeze solid in winter, despite low temperatures.

A water strider can walk across the surface of a small pond.

Organisms resist temperature changes, although they give off heat due to chemical reactions.

Water can act as a solvent.

The pH of water remains exactly neutral

ionic bonds.

hydrogen bonds between water molecules.

covalent bonds between atoms within water molecules.

polar covalent bonds.

nonpolar covalent bonds

water's change in density when it condenses

water's ability to dissolve molecules in the air

the release of heat by the formation of hydrogen bonds

the absorption of heat by the breaking of hydrogen bonds

water's high surface tension

They maintain a constant pH when bases are added to them but not when acids are added to them.

They maintain a constant pH when acids are added to them but not when bases are added to them.

They maintain a constant pH of exactly 7 in all living cells and biological fluids

They maintain a relatively constant pH when either acids or bases are added to them.

They are found only in living systems and biological fluids.

nonpolar substances that repel water molecules.

nonpolar substances that have an attraction for water molecules

polar substances that repel water molecules

ar substances that have an affinity for water.

charged molecules that hydrogen-bond with water molecules.

The liquid water molecules have more kinetic energy and thus support the ice.

The ionic bonds between the molecules in ice prevent the ice from sinking.

Ice always has air bubbles that keep it afloat.

Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water

The crystalline lattice of ice causes it to be denser than liquid water

as a polar molecule, it can surround and dissolve ionic and polar molecules

it forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with non polar molecules

it forms hydrogen bonds with itself so cohesion is possible

it is liquid and will adhere to many substances