Explain why one would recrystallize a solid from a solvent pair instead of a single solvent....
Explain why one would recrystallize a solid from a solvent pair instead of a single solvent. Explain how it works in terms of solubilities.
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Explain why one would recrystallize a solid from a solvent pair
instead of a single solvent....
You would recrystallize benzoic acid using water as the solvent rather than methanol. Explain why.
You would recrystallize benzoic acid using water as the solvent rather than methanol. Explain why.
What would be wrong with simply evaporating the solvent (instead of vacuum filtering the solvent from...
What would be wrong with simply evaporating the solvent (instead of vacuum filtering the solvent from the crystals) once the crystals have been formed
Explain why multiple extractions with smaller volumes of the extraction solvent are typically "better" than single...
Explain why multiple extractions with smaller volumes of the extraction solvent are typically "better" than single extractions with a larger volume of the extraction solvent.
12. Compare and contrast the solubility of a solid and a gas in a liquid solvent. What factors influence solubility? What similarities and differences are there between gas and solid solubilitie...
12. Compare and contrast the solubility of a solid and a gas in a liquid solvent. What factors influence solubility? What similarities and differences are there between gas and solid solubilities? How do the solubilities function in KMT terms? 13. a) Calculate the frequency and energy of 1 mol of photons with wavelength equal to 5.34x10m which are emitted by a compound. b) To what temperature would this quantity of energy raise 627 mL of water initially at 11.5 C?...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic solvents? 2. Of the following, which are flammable? Circle all that apply. Acetone Water Ethanol 3. An organic compound (literature mp=255 - 256°C) has the following solubilities: solvent soluble cold soluble hot acetone yes yes water no no ethanol no yes petroleum ether no no Which is the best solvent to recrystallize the organic compound? Why? Why are the other solvents not suitable? Explain...
1.explain why a single pair product is obtain from hydroboration - oxidation of 2 - butyne,...
1.explain why a single pair product is obtain from hydroboration - oxidation of 2 - butyne, whereas two products are obtained from Hyderabad kitchen of 2 - pentyne 2. the ketone to heptanone has been identified as contributing to the odor of a number of dairy products, including condensed milk and cheddar cheese. describe a synthesis of 2-heptanone from acetylene and any necessary organic or inorganic reagents
1. When would a lock-in amplifier be needed instead of a modulation technique? Explain how a...
1. When would a lock-in amplifier be needed instead of a modulation technique? Explain how a lock-in amplifier works. 2. Briefly explain how a photodiode detector work.(By diagram)
This is a Solvent-Free Synthesis of Chalcones: Claisen-Schmidt Condensation The Chalcone starting materials are: p-bromoscetophenone (solid)...
This is a Solvent-Free Synthesis of Chalcones: Claisen-Schmidt
Condensation
The Chalcone starting materials are:
p-bromoscetophenone (solid)
p-chlorobenzaldehyde (solid)
11. [3 points) Draw the curved-arrow mechanism for your chalcone from the starting materials that you used. Explain why this reaction produces only one chalcone and not a mixture.
Explain why dichloromethane is a good solvent to remove the fat from the milk? Can you...
Explain why dichloromethane is a good solvent to remove the fat from the milk? Can you use organic solvent like ethanol to replace dichloromethane in this experiment?
3. If the TLC plate development had stopped before the solvent front reached the top of...
3. If the TLC plate development had stopped before the solvent front reached the top of the TLC plate (i.e. maybe it reached the middle of the TLC plate when it was stopped, instead): a) Would the Rf values have been affected? If so, how? If not, why not? Give a numerical example to support your answer. b) Would the size of the spots have been affected? If so, how? If not, why not? (Hint: think about the diffusion of...
12. Compare and contrast the solubility of a solid and a gas in a liquid solvent. What factors influence solubility? What similarities and differences are there between gas and solid solubilities? How do the solubilities function in KMT terms? 13. a) Calculate the frequency and energy of 1 mol of photons with wavelength equal to 5.34x10m which are emitted by a compound. b) To what temperature would this quantity of energy raise 627 mL of water initially at 11.5 C?...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic solvents? 2. Of the following, which are flammable? Circle all that apply. Acetone Water Ethanol 3. An organic compound (literature mp=255 - 256°C) has the following solubilities: solvent soluble cold soluble hot acetone yes yes water no no ethanol no yes petroleum ether no no Which is the best solvent to recrystallize the organic compound? Why? Why are the other solvents not suitable? Explain...
This is a Solvent-Free Synthesis of Chalcones: Claisen-Schmidt
Condensation
The Chalcone starting materials are:
p-bromoscetophenone (solid)
p-chlorobenzaldehyde (solid)
11. [3 points) Draw the curved-arrow mechanism for your chalcone from the starting materials that you used. Explain why this reaction produces only one chalcone and not a mixture.
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