Concept explainers
Use the following phase diagram for questions 9 and 10.
The following phase diagram is for salt water. There are four possible phases, which depend on the temperature and the sodium chloride content (NaCl).
- Ice and SC = Mixed ice and salt crystals.
- Ice and SW = Ice and salt water.
- SW = Salt water.
- SW and SC = Salt water and salt crystals.
There are often multiple ways to solve the same problem; here we look at a few alternative ways to determine the phase of the mixture.
- 9. a. In column C, develop the equation for the line dividing the phases of the ice–salt water mix and the salt water. Assume it was written in cell C11 and copied down.
- b. In column D, develop the equation for the line dividing the phases of the salt water and the salt water-salt crystals mix. Assume it was written in cell D11 and copied down.
- c. In column E, write an expression to determine the phase of the mixture.
- d. Use conditional formatting to highlight the various phases. Provide a color key.
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