In the separation of the Naphthalene experiment. A student accidentally let some of the vapor escape the beaker. AS a result of this error, will the mass of naphthalene recorded be too high, too low, or unaffected? why?
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In the separation of the Naphthalene experiment.
A student accidentally let some of the vapor escape the beaker. AS a result of this error, will the mass of naphthalene recorded be too high, too low, or unaffected? why?
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- Why does the separation apparatus must be vented after several inversions? a to make the stopcock tighter b to release built-up pressure c to reduce liquid solvent d to aid the separationWhat, if any, impact is using drops instead of specific volumes has on the experiment?A student accidentally started the chromatographic run without saturating the beaker with the solvent. Which of the following can happen due to that mistake? A. The mobile phase will travel slower through the plane B. The components will have a better separation due to the action of air C. The distance traveled by the components are easily measured D. All of the above
- 1. Why is it necessary to cover the developing chamber tightly during the development of a chromatogram? 2. Can paper chromatography be used to separate and identify very volatile substances? Explain your answer.A student doing this experiment had some problems with the procedure, as described below. Explain what effect each problem would have had on the magnitude of the results calculated. b) The student neglected to open the pinch clamp on the plastic tubing between the filter flask and the beaker when the Mg came in contact with the HCl solution. After the stopper popped out of the Erlenmeyer flask, the student quickly replaced the stopper, opened the clamp, and proceeded with the experiment. c) The student began titrating the unreacted HCl with standard NaOH solution and realized that there was a large air bubble in the buret tip. The bubble came out as the first few milliliters of titrant were added. d) The student forgot to add indicator to the titration mixture until 12.50 mL of titrant had been added. When the indicator was finally added, the solution was colorless.A sample of fried potatoes weighing 200 g was extracted using a volatile organic solvent. The recovered cooking oil weighed 15 g. What methods from this experiment could be used to separate the cooking oil after the extraction? What was the percent oil in the potatoes? Show your calculations. How is gravity filtration different from vacuum filtration? Give examples of mixtures that can be separated by gravity filtration.
- Chemistry Consider the following chromatogram. The early eluting peaks and later eluting peaks exhibit a problem. Propose a way in gas chromatography to eliminate both problems.1. How would the calculated recovery be affected if the collecting flask used in distillation was not dry? Select one: It will not be affected. It will decrease. The effect cannot be determined. It will increase. 2. What will be the effect of the formation of air bubbles on the sides of the eudiometer to the calculated mass of Mg in the Ideal Gas Experiment? Select one: Decrease Increase Cannot be determined No effectThe entire mercury bulb of the thermometer must be below the level of the side – arm in order to obtain an accurate reading of the distillation temperature. Why is this so?