Unit 5 Chemistry of the Ocean

Front

Draw the atomic structure of a water molecule and label the atoms.

Back

Water molecule consists of two hydrogen atoms and one oxygen atom.

Front

Explain what a hydrogen bond is and why it is important for the properties of water.

Back

A hydrogen bond is a weak bond between the positive end of one water molecule and the negative end of another water molecule. It causes cohesion, adhesion, and water spreading out as it freezes.

Front

Explain why water is less dense as a solid and why that allows ice to float.

Back

As water freezes, it forms a crystalline structure with hydrogen bonds, causing molecules to spread out and become less dense.

Front

Define hypersaline and brackish water.

Back

Hypersaline means high salinity (above 35 ppt). Brackish is a mix of fresh and salt water (would have a low ppt).

Front

Describe the colligative properties of water. How does saltwater compare to freshwater in terms of density?

Back

Saltwater (SW) is more dense than freshwater.

Front

How does saltwater compare to freshwater in terms of freezing point?

Back

Saltwater freezes at a lower temperature than freshwater.

Front

How does saltwater compare to freshwater in terms of boiling point?

Back

Saltwater boils at a hotter temperature than freshwater.

Front

How does saltwater compare to freshwater in terms of heat capacity?

Back

Saltwater has a lower heat capacity than freshwater.

Front

How does saltwater compare to freshwater in terms of pH?

Back

Saltwater has a higher pH than freshwater.

Front

How does saltwater compare to freshwater in terms of evaporation rate?

Back

Saltwater evaporates slower than freshwater.