Properties of Water Review

Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?

• Flooding would occur and animals would be forced to migrate

•  Harmful organisms living in water would reproduce at a rapid rate

• Organisms that are sensitive to changes in temperature would die

• Plants would not have enough water to effectively carry out photosynthesis

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Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?

• Water absorbs heat when it evaporates and forms a gas

• Water expands and becomes less dense when it freezes.

• Water molecules completely separate into ions in solutions.

• Water forms hydrogen bonds with ions and other polar substances.

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Which of the following characteristics of water is not a result of hydrogen bonding?

• adhesive strength

• capillarity

• cohesive strength

• All of the above are a result of hydrogen bonding.

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.

Water is often called the "universal solvent" because many substances can be dissolved in water. What property of water allows it to be such a versatile solvent?

• purity

• polarity

• high heat capacity

• expansion upon freezing

molecule in which opposite ends have opposite electric charges

• cohesion

• polar molecule

• hydrogen bond

• solution

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The curve in this meniscus is caused by the attraction between the water and the glass known as

• solute

• surface tension

• cohesion

• adhesion

A weak bond between the negative part of one water molecule and the positive part of another water molecule

• Covalent Bond

• Hydrogen Bond

A "film" on top of the water caused by hydrogen bonding and cohesion

• Surface Tension

• Capillary Action

• Adhesion

• Solute

A molecule where the electrons are not evenly distributed -- one part of the molecule will have a small positive charge (+) and the other part will have a slight negative charge (-)

• Polar molecule

• Capillary Action

• Surface Tension

• Adhesion