In the system NaCl-H2O, a simple eutectic is observed at −21.1°C for a solution containing 23.3% by weight NaCl where NaCl•2H2O and ice crystallize out of the mixture. At a composition of 27% by weight of NaCl and at −9°C a peritectic point exists where the dihydrate decomposes to form anhydrous NaCl. The temperature coefficient of solubility of anhydrous NaCl is very small and positive. Make a rough sketch for the system showing clearly the phases in equilibrium in the various areas and along the curves of the diagram.
In the system NaCl-H2O, a simple eutectic is observed at −21.1°C for a solution containing 23.3% by weight NaCl where NaCl•2H2O and ice crystallize out of the mixture. At a composition of 27% by weight of NaCl and at −9°C a peritectic point exists where the dihydrate decomposes to form anhydrous NaCl. The temperature coefficient of solubility of anhydrous NaCl is very small and positive. Make a rough sketch for the system showing clearly the phases in equilibrium in the various areas and along the curves of the diagram.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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In the system NaCl-H2O, a simple eutectic is observed at −21.1°C for a solution containing 23.3% by weight NaCl where NaCl•2H2O and ice crystallize out of the mixture. At a composition of 27% by weight of NaCl and at −9°C a peritectic point exists where the dihydrate decomposes to form anhydrous NaCl. The temperature coefficient of solubility of anhydrous NaCl is very small and positive. Make a rough sketch for the system showing clearly the phases in equilibrium in the various areas and along the curves of the diagram.
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