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272 Chapter 13 Solutions (c) -1.50 -1.70 -1.90 Freezing Point of Seawater (°C) -2.10 -2.30 -2.50 -2.70 -2.90 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Salinity (g NaCl/kg seawater) This graph provides a better representation of how salinity influences the freezing point of seawater compared to Figure b because the salinities are more typically seen in oceans. Copyright © 2017 Pearson Education, Inc.