Properties of Water

Water is the universal solvent since it's:

• water
• such a small molecule 
• polar
• essential to life

Cohesion and adhesion have this in common:

• Hydrogen bonding
• They create non-polar molecules
• Only relate to water
• Universal solvent

Tags

NGSS.HS-ESS2-5

Describe COHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

Describe ADHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

Describe SURFACE TENSION.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Measure of how difficult it is to break the surface of a liquid.

• Water molecules attracted to other substances.

Tags

NGSS.HS-ESS2-5

Describe CAPILLARY ACTION.

• Measure of how difficult it is to break the surface of a liquid.

• Water molecules climbing up against the force of gravity.

• Water molecules attracted to other substances.

• Water molecules dissolving many substances because of its polarity.

Which best describes the image shown?

• it is a water molecule. It is polar
• it is not a water molecule. It is polar
• It is a salt molecule. It is polar
• It is a water molecule. It is not polar

Tags

NGSS.MS-PS1-1

What two elements make up water?

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

Tags

NGSS.MS-PS1-1

A water strider can skate along the top of a pond because:

• covalent bonds result in water cohesion
• hydrogen bonds result in water cohesion (surface tension)
• water striders have adapted to take advantage of water cohesion
• low surface tension of water

Tags

NGSS.HS-LS4-4

Why can water have no net charge but 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

Tags

NGSS.MS-PS1-1