Azeotropic mixture of water and HCl boils at 381.5 K. By distilling the mixture it is possible to obtain
Correct answer: C. Neither HCl nor water
- A. Pure HCl only
- B. Pure water only
- C. Neither HCl nor water
- D. Both water and HCl in pure state
Explanation
An azeotrope is a mixture that exhibits the same concentration in the vapor phase and the liquid phase. This is in contrast to ideal solutions with one component typically more volatile than the other; this is how we use distillation to separate materials. If the mixture forms an azeotrope, the vapor and the liquid concentrations are the same, which preventing separation via this approach.
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Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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