6.3 Water & Its Solutions

A _______________________ property is a characteristic of matter that can be observed or measured without changing the composition of the substance

• chemical

• matter

• substance

• physical

This is the property of having two opposite poles, or ends

• polarity

• endity

• bonding

• polaroid

When molecules have an unequal distribution of charges causing oppositely charged regions, they are called ___________________ molecules

• opposite

• covalent

• polar

• ionic

The oxygen molecules of water have a slightly _____________ charge

• negative

• neutral

• equal

• positive

The hydrogen molecules of water have a slightly _____________ charge

• negative

• neutral

• equal

• positive

Oxygen gains a slightly negative charge in a water molecule because it is more ___________________________ than hydrogen

• positive

• electronegative

• neutralized

• energetic

Regions of opposite charge cause weak electrostatic attractions between molecules called

• Luke Skywalker forces

• Van der Waals forces

• Chemostatic forces

• Electronegative forces

Van der Waals forces cause intermolecular forces which determine characteristics such as boiling point and melting point.

• True

• False

The attraction of areas of slight positive and negative charges around a water molecule do which of the following? (May be more than one answer)

• Give water the many properties that enables of life on Earth

• Allows substances to easily dissolve in water

• Makes water freeze at any tempearture

• Gives water high specific heat properties (high temperature to boil)

What type of bond is a strong type of van der Waals force?

• nitrogen

• hydrogen

• oxygen

• fluorine