1. If the freezing point of the solution is recorded 0.2°C lower than the actual freezing point, will the molarmass determination for the unknown solid be too high or too low? Explain.2. If a thermometer is miscalibrated to read 0.5 °C higher than the actual temperature over its entire scale,how will it affect the reported molar mass of the solute? Explain.3. Cyclohexane has a relatively high vapor pressure. If some of the cyclohexane evaporates during theexperiment, how will this affect the AT? How will this affect the reported molar mass of the unknownsolute? Explain.4. Why was a salt/ice bath used in this experiment instead of just an ice bath?

Qus-1 If calculated freezing point lowering is less than actual one then calculated molality will…

Answered: 1. If the freezing point of the…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.18QAP

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Similar questions

In 100L of water, there are 30kg of solute. If the distribution coefficient is 4, what is the weight of the unextracted solute in 35L of ether?
What is the correlation between distribution coefficient and polarity? There is 0.17 g of benzoic acid in methylene chloride and therefore 0.03g of benzoic acid in the aqueous phase. what is the distribution coefficient and how is it related to the polarities of these things?
1a. Use the given table to construct a temperature-composition diagram for cyclohexane Toluene mixture. Based on the plot, what is the composition of the distillate obtained by Simple distillation 20 mole percent cyclohexene and 80 mole percent toluene? Show your Work on the plot. 1b. Estimate the composition of the distillate of 20 mole percent of cyclohexane if the Distillation column had three theoretical plates.
1. Why should the stopper always be removed from a separatory funnel whenever a liquid is being drained through the stopcock?2. The distribution coefficient, KD (ether/water), between ether and water for aspirin at room temperature is 3.5. What weight of aspirin would be extracted by a single extraction with 60 ml of water from a solution of 10 grams of aspirin in 100 ml of ether? Calculate the weight of aspirin which would be removed by three extractions with 20 ml portions of water.
In which of the following cases would recrystallization be favored over extraction when purifying a mixture of two solid compounds? I. When the desired compound is freely soluble in the solvent pair at all temperatures. II. When a significant difference in pKa exists between the two compounds. III. When there is a significant excess of the undesired compound.
Which properties would be ideal in selecting the compound to be used as a primary standard for quantitative volumetric analysis?
There are two separate phases, one with a composition of 12% phenol and the other with a composition of 60% phenol, from a 210 gram phenol-water mixture at 60 °C with a composition of 35% phenol. Calculate the masses of these phases.
hree components in a mixture have varying distribution constants between the mobile phase and the stationary phass One of the components has a very low distribution constant, Would this component likely elute first or last and how would you design an experiment or modify the components of the separation to make it perform in the opposite manner?
When I used this answer, it gave me this feedback: You used the mole fraction of the solute instead of the mole fraction of benzene.
You are carrying out an experiment by analysing alcoholic drinks by gas chromatography. Why is Gas chromatography the best technique used for this analysis? Why is Carbowax a suitable stationary phase for this analysis? What gases are used and what is their purpose and source?
Q. No. 5 Write functions and procedure of analysis of various volatile organic molecules by using Gas chromatography
There are two separate phases, one with a composition of 12% phenol and the other with a composition of 60% phenol, from a 210 gram phenol-water mixture with 35% phenol at 60oC. Calculate the masses of these phases.

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