Which one of the following would cause an error in the calculated value of the m
ID: 1072914 • Letter: W
Question
Which one of the following would cause an error in the calculated value of the molal boiling point elevation constant, kb as performed in the Colligative Properties experiment? a. using a measured value of the boiling point of water b. not taking into account that the solution is of an ionic substance c. not reading the value of the barometric pressure in the room d. boiling too vigorously, such that amount of solvent is decreased before measurement of the boiling point of the solution. e. two of the above would cause an errorExplanation / Answer
Answer :e
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The boiling point height is a colligative property, which implies that it is reliant on the nearness of disintegrated particles and their number, yet not their personality. It is an impact of the weakening of the dissolvable within the sight of a solute. It is a wonder that happens for all solutes in all arrangements, even in perfect arrangements, and does not rely on upon a particular solute-dissolvable associations. The breaking point height happens both when the solute is an electrolyte, for example, different salts, and a nonelectrolyte. In thermodynamic terms, the birthplace of the breaking point height is entropic and can be clarified as far as the vapor weight or substance capability of the dissolvable. In both cases, the clarification relies on upon the way that numerous solutes are just present in the fluid stage and don't go into the gas stage (aside from at to a great degree high temperatures).
Put in vapor weight terms, a fluid bubbles at the temperature when its vapor weight meets the encompassing weight. For the dissolvable, the nearness of the solute diminishes its vapor weight by weakening. A non-unpredictable solute has a vapor weight of zero, so the vapor weight of the arrangement is not exactly the vapor weight of the dissolvable. Hence, a higher temperature is required for the vapor weight to achieve the encompassing weight, and the breaking point is raised.
Put in synthetic potential terms, at the breaking point, the fluid stage and the gas (or vapor) stage have a similar compound potential (or vapor weight) implying that they are vivaciously identical. The synthetic potential is subject to the temperature, and at different temperatures either the fluid or the gas stage has a lower substance potential and is more vigorously good than the other stage. This implies when a non-unstable solute is included, the synthetic capability of the dissolvable in the fluid stage is diminished by weakening, yet the compound capability of the dissolvable in the gas stage is not influenced. This implies thusly that the harmony between the fluid and gas stage is set up at another temperature for an answer than an unadulterated fluid, i.e., the breaking point is lifted.
The wonder of the point of solidification despondency is similar to breaking point height. In any case, the size of the point of solidification gloom is bigger than the breaking point rise for a similar dissolvable and a similar convergence of a solute. As a result of these two marvels, the fluid scope of a dissolvable is expanded within the sight of a solute.
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