Melting point can be used to identify unknowns. What information besides the experimental melting point is...
Melting point can be used to identify unknowns. What information besides the experimental melting point is needed to make the identification? Is the identification definitive? In other words, can a melting point be the sole basis of the identification of a compound?
Homework Answers
In addition to melting point, other physical properties such as density, heat capacity, refractive index or boiling point are needed. In addition spectra such as IR, NMR and UV visible are needed.
Melting point cannot be the sole basis of the identification of a compound. It may happen that two different compounds may have same melting point.
Apart from the experimental melting point, we also need mixed melting point for the identification of the unknown.
In mixed melting point, an unknown sample is mixed with known standard (having same melting point). If the melting point of mixture is not depressed, then the unknown sample is same as the known standard.In other words, if the mixture has same melting point as either of two samples (unknown and standard), then two samples are same.
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Melting point can be used to identify unknowns. What information
besides the experimental melting point is...
1. You are conducting a melting-point determination to identify a compound whose handbook melting-point range is...
1. You are conducting a melting-point determination to identify a compound whose handbook melting-point range is 112 - 114 °C. Comment on the purity of the sample, and the possible identity of the substance, when your experimental melting-point range is : A. 114 -116 °C B. 94 - 102 °C I would C. 102 - 103 °C
Can you identify a solid compound based on melting point data alone?
Can you identify a solid compound based on melting point data alone?
Reduction of Benzil: Meso melting point = 137-139 Experimental melting point = 136.6-137.9 Can so...
Reduction of Benzil:
Meso melting point = 137-139
Experimental melting point = 136.6-137.9
Can someone please help with part b and c thanks!
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your IR data, was your reaction successful? Explain, citing peaks to illustrate your point.
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your...
What voltage (in volts) should be used when performing a melting point determination on a compoun...
What voltage (in volts) should be used when performing a melting point determination on a compound whose melting point is 170oC?
1. Why are melting point measurements used only to identify organic compounds and not to measure...
1. Why are melting point measurements used only to identify organic compounds and not to measure inorganic chemicals? 2. What is Freezing point? Can you give an example in your daily life? What happens when sugar is continuously added into a cup of water? What is the difference if the saturated sugar cup of water is heated? 3.
these are unknowns A,B,C,D Un altach to your Final Report Based on your experimental results and...
these are unknowns A,B,C,D
Un altach to your Final Report Based on your experimental results and your knowledge of ionic and covalent classify each unknown as covalent or ionic. ledge of ionic and covalent bonds, D: 2. a) Which one of your unknowns had the lowest melting point? b) Consider the following substances: CO. Hz and LiF. Calculate the electronegativity difference (AEN) using the table in this Handout. (This table is also posted on Carmen under General Information). Rank from...
- A student is trying to identify an unknown solid based on its melting point. She...
- A student is trying to identify an unknown solid based on its melting point. She noted that the compound began to melt at 182°C and finished melting at 187°C. Knowing it is possible for there to be impurities in the sample, is this compound more likely to be camphor or hydroquinone. Explain your reasoning. A young chemist has synthesized what he believed to be acetaminophen. He measured the melting point of this newly formed compound to be 163-178°C. If...
Based on the melting point and specific rotation experimental data: a.draw the structure(s) of the product(s)...
Based on the melting point and specific rotation experimental
data:
a.draw the structure(s) of the product(s) of the trans-cinnamic
acid addition reaction with bromine.
b. State whether the addition of Br2followed asyn or
antiaddition or both. Give reasons.
c. Is this product chiral? If so, identify the chirality
centers.
d. Is the product of the trans-cinnamic acid addition reaction
with bromine optically active? Give reasons.
e. Is your answer to Question 2d what you expected? Give
reasons.
f. What is...
what is my unknown based on this information? I did not get an experimental IR graph. I need the name of the unknown com...
what is my unknown based on this information? I did not get an experimental IR graph. I need the name of the unknown compound, and literature IR graph. Boiling point : 150 degrees C Melting Point : -31 degrees C Refractive Index : 1.4087 Density: 0.815
Besides being used in outdoor speaker systems/loudspeakers, what are other applications Class A amplifiers can be...
Besides being used in outdoor speaker systems/loudspeakers, what are other applications Class A amplifiers can be used in?
1. You are conducting a melting-point determination to identify a compound whose handbook melting-point range is 112 - 114 °C. Comment on the purity of the sample, and the possible identity of the substance, when your experimental melting-point range is : A. 114 -116 °C B. 94 - 102 °C I would C. 102 - 103 °C
Reduction of Benzil:
Meso melting point = 137-139
Experimental melting point = 136.6-137.9
Can someone please help with part b and c thanks!
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your IR data, was your reaction successful? Explain, citing peaks to illustrate your point.
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your...
1. Why are melting point measurements used only to identify organic compounds and not to measure inorganic chemicals? 2. What is Freezing point? Can you give an example in your daily life? What happens when sugar is continuously added into a cup of water? What is the difference if the saturated sugar cup of water is heated? 3.
these are unknowns A,B,C,D
Un altach to your Final Report Based on your experimental results and your knowledge of ionic and covalent classify each unknown as covalent or ionic. ledge of ionic and covalent bonds, D: 2. a) Which one of your unknowns had the lowest melting point? b) Consider the following substances: CO. Hz and LiF. Calculate the electronegativity difference (AEN) using the table in this Handout. (This table is also posted on Carmen under General Information). Rank from...
- A student is trying to identify an unknown solid based on its melting point. She noted that the compound began to melt at 182°C and finished melting at 187°C. Knowing it is possible for there to be impurities in the sample, is this compound more likely to be camphor or hydroquinone. Explain your reasoning. A young chemist has synthesized what he believed to be acetaminophen. He measured the melting point of this newly formed compound to be 163-178°C. If...
Based on the melting point and specific rotation experimental
data:
a.draw the structure(s) of the product(s) of the trans-cinnamic
acid addition reaction with bromine.
b. State whether the addition of Br2followed asyn or
antiaddition or both. Give reasons.
c. Is this product chiral? If so, identify the chirality
centers.
d. Is the product of the trans-cinnamic acid addition reaction
with bromine optically active? Give reasons.
e. Is your answer to Question 2d what you expected? Give
reasons.
f. What is...
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