What is the correction to the atmospheric pressure due to the 40.8 mm height of the solution in the tube and above the level in the beaker?
Correct answer: A. 3.0 mm Hg
- A. 3.0 mm Hg
- B. 6.0 mm Hg
- C. 13.6 mm Hg
- D. 27.2 mm Hg
- E. 40.8 mm Hg
Explanation
The 40.8 mm of water being held up in the tube by atmospheric pressure can be changed to its equivalent height of mercury by dividing it by 13.6, since 1 mm of Hg = 13.6 mm of water. By correcting the atmospheric pressure, we get: 730 mm Hg - 3 mm Hg = 727 mm Hg.
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About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
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