Properties of Water

What property of water allows it to be such a versatile solvent that it is often called the universal solvent?

• Purity
• Polarity and cohesion
• High heat capacity
• Expansion upon freezing

Why don't large bodies of water fluctuate in temperature quickly?

• Water is a solvent.
• Water has a high heat capacity.
• Water acts as a buffer.
• Water is non-polar.

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

What word describes when water is attracted to substances other than water?

• cohesion
• adhesion
• capillary action
• surface tension

Why do water molecules have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Attractions of a water molecule to another water molecule is called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Why does ice float on top of water?

• As water freezes it expands and its density decreases.
• As water freezes it takes up more hydrogen from the atmosphere causing it to float.
• As water freezes air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes it takes up more oxygen from the atmosphere causing it to float.

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

What is the reason why oil and water don't mix?

• Oil is too heavy to mix with water
• Water can only mix with polar molecules 
• Water can only mix with non-polar molecules
• Oil is too light to mix with water