Structure of Water and Hydrogen Bonding

molecule in which opposite ends have opposite electric charges

• cohesion

• polar molecule

• hydrogen bond

• solution

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

Attractions between water molecules are called

• Covalent bonds

• Ionic bonds

• Polar bonds

• Hydrogen bonds

The hydrogen atoms in a water molecule are ________________ charged.

• not

• negatively

• neutrally

• positively

Which term refers to water having a slightly positive and a slighty negative charge on its ends?

• cohesion

• surface tension

• polar

• adhesion

Surface tension is caused by ...

• strong cohesion between water molecules

• strong adhesion between the water molecules

• condensation

• water cycle

Water drops being attracted to each other is an example of ____________.

• capillary action

• adhesion

• specific heat index

• cohesion

What is the molecular geometry of a water molecule?

• Linear

• Bent

• Trigonal planar

• Tetrahedral

Which type of bond is primarily responsible for the high boiling point of water?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Van der Waals forces