Concept explainers
The phase diagram shown is for mixtures of HCI and
a. As a solution containing
b. In the boiling of a pure liquid, there is no change in composition. However, as a solution of HCI(aq) boils in an open container, the composition changes. Explain why this is so.
c. One particular solution (the azeotrope) is an exception to the observation stated in part (b); that is, its composition remains unchanged during boiling. What are the approximate composition and boiling point of this solution?
d. A 5.00 mL sample of the azeotrope (d = 1.099 g/mL) requires 30.32 mL of 1.006 M NaOH for its titration in an acid-base reaction. Use these data to determine a more precise value of the composition of the azeotrope, expressed as the mole fraction of HCI.
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GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
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