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

Large bodies of water do not quickly fluctuate in temperature. Why?

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

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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 other substances?

• Cohesion

• Adhesion

• Capillary action

• Surface tension

Attractions between water molecules are called

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

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What property of water helps to moderate earth's temperature?

• Adhesion

• Cohesion

• Specific heat capacity

• Latent heat of vaporization

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• 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 have a greater buoyancy.

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Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

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How many hydrogen atoms are in a water molecule?

• 5

• 1

• 2

• 0

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Why is water called the universal solvent?

• It is polar.

• It exist in the universe.

• It dissolves many materials.

• It has oxygen and hydrogen.

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