Water Properties and pH

Why is a water molecule polar?

• Because there is an uneven distributions of electrons between the oxygen and hydrogen atoms

• Because water is neutral

• Because water is one of the few compounds found in a liquid state.

What is a "surface tension" force?

• An attraction between molecules of different substances

• A force that is responsible for the capillary action causing water in columns to rise.

• The strong cohesion between water molecules that produces a force which can support very lightweight objects.

This attraction occurs between molecules of different substances.

• An attraction

• Cohesion

• Adhesion

A compound that is known to produce hydroxide (OH-) in solutions is called a..

• Base

• Acid

• Buffer

The concentration of H+ ions determines...

• whether solutions are acidic or basic.

• whether solutions are cohesion or adhesion substances.

• whether solutions are hot or cold.

When an ionic compound such as sodium chloride is placed in water, what can occur?

• water molecules surround and combine electrons and neutrons.

• water molecules surround and separate the positive and negative ions.

• water molecules remain in its original state or form.

Tags

NGSS.MS-PS1-2

What two elements make up water?

• helium and oxygen

• helium and carbon

• hydrogen and oxygen

• oxygen and carbon

Tags

NGSS.MS-PS1-1

Water is a universal solvent because it...

• It can be found anywhere

• It freezes when it gets cold

• floats when frozen

• dissolves most substances

The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form.

• less polar

• less dense

• more polar

• more dense

Which statement explains why water molecules stick together?

• both sides are negative

• one side has a positive charge and the other side has a negative charge

• one side has a negative charge and the other side has a neutral charge

• both sides are positive