The salinity of seawater can vary in the world’s oceans as shown in the map, which indicates salinity in units of percent by mass NaCl. Examine the image and answer the questions that follow.

a. Which regions of the globe generally have higher salinity?

Lower salinity? State your answer as a general trend in the salinity of seawater.

b. Speculate on possible reasons for the trend you observed in part a.

c. Calculate the freezing point of a sample of seawater taken from the middle of the Atlantic Ocean. Use a van’t Hoff factor of 1.9 for your calculation.

d. Make a graph of the freezing point of the seawater versus salinity for the range of salinities in the world’s oceans.

Transcribed Image Text:

P QOR 53 Salinity (%) more than 3.7 3.7 3.6 3.5 3.4 less than 3.4 Salinity of Seawater