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what is the purpose of recrysta
Identity of unknown based on results of melting point and...
30pts total) 1. Irwo known substances have the same melting point as an unknown substance that...
30pts total) 1. Irwo known substances have the same melting point as an unknown substance that you obtained, how could you determine if either of the two known substances is your unknown compound? 2. You are given an impure mix of substances that contains a solid substance, Chemical X, that is soluble in ethanol at all temperatures. You know there is an insoluble impurity in the mix as well as a very soluble impurity, both in ethanol. Can you recrystallize...
- 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 melting point analysis and HPLC analysis of your recrystallized sample, is your aspirin sample...
Based on melting point analysis and HPLC analysis of your recrystallized sample, is your aspirin sample pure? Support your answer with the actual numerical values of the literature and experimental melting points. Give identity and area % value of any compound present in your HPLC chromatogram. Be sure to give correct units.
In the Unknown/Urea and Unknown/Cinnamic Acid mixtures only a LITTLE BIT of the Unknown was put...
In the Unknown/Urea and Unknown/Cinnamic Acid mixtures only a
LITTLE BIT of the Unknown was put in. Please identify the unknown
based off this data and tell how you came to the conclusion.
8. Study the experimental melting point data in Table 2 for this experiment, with the goal of making a determination of the identity of the unknown (either cinnamic acid or urea) based on this data. Table 2. Melting Point Data # Compound/Mixture Observations/Comments Melting Point/C (mp) or...
3. The melting point of unknown A was measured to be 110-120°C and unknown B was...
3. The melting point of unknown A was measured to be 110-120°C and unknown B was measured to be 105-109°C. What statement would make the best conclusion about the identity and purity of the product? (4 pts) A. Unknown A range of 110-120°C is the pure substance. Unknown B range of 105-109°C contains impurities. B. Unknown B range of 105-109°C is the pure substance. Unknown A range of 110-120°C contains impurities. C. Both Unknown A and B are pure substances....
Question 1 5 pts - What is the purpose of melting point? All the answers To...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 15 pts USING THE PROVIDED INFORMATION, DETERMINE THE IDENTITY OF THE UNKNOWN BACTERIA BASED...
Question 1 15 pts USING THE PROVIDED INFORMATION, DETERMINE THE IDENTITY OF THE UNKNOWN BACTERIA BASED UPON THE FIVE SPECIES UTILIZED IN THE LABORATORY THIS SESSION AND ANSWER THE PROVIDED QUESTIONS GRAM'S STAIN RESULT UNKNOWN GRAM'S STAIN ACID-FAST STAIN RESULT UNKNOWN VL ACID FAST STAIN ACID-FAST STAIN RESULT UNKNOWN #1 ACID-FAST STAIN REACTION CATALASE TEST RESULT UNKNOWN 21 CATALASE REACTION 1 What is the identity of your unknow sample based on the results seen in the above images? What is...
Post lab questions for chromatography and melting point lab. i have a few ideas of what the answers to these questions s...
Post lab questions for chromatography and melting point lab. i
have a few ideas of what the answers to these questions should be,
but I would like to double check. if anyone can help me, that would
be so awesome. Thank you!
A student cools a sample in a capillary tube after melting it. Upon attempting to determine the melting point on the same sample, the student does not obtain the same melting point. Why? A student places his TLC...
The melting point of an unknown solid is determined to be 53°C. What is this temperature...
The melting point of an unknown solid is determined to be 53°C. What is this temperature on the Fahrenheit and Kelvin scales? Temperature Temperature K
30pts total) 1. Irwo known substances have the same melting point as an unknown substance that you obtained, how could you determine if either of the two known substances is your unknown compound? 2. You are given an impure mix of substances that contains a solid substance, Chemical X, that is soluble in ethanol at all temperatures. You know there is an insoluble impurity in the mix as well as a very soluble impurity, both in ethanol. Can you recrystallize...
- 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...
In the Unknown/Urea and Unknown/Cinnamic Acid mixtures only a
LITTLE BIT of the Unknown was put in. Please identify the unknown
based off this data and tell how you came to the conclusion.
8. Study the experimental melting point data in Table 2 for this experiment, with the goal of making a determination of the identity of the unknown (either cinnamic acid or urea) based on this data. Table 2. Melting Point Data # Compound/Mixture Observations/Comments Melting Point/C (mp) or...
3. The melting point of unknown A was measured to be 110-120°C and unknown B was measured to be 105-109°C. What statement would make the best conclusion about the identity and purity of the product? (4 pts) A. Unknown A range of 110-120°C is the pure substance. Unknown B range of 105-109°C contains impurities. B. Unknown B range of 105-109°C is the pure substance. Unknown A range of 110-120°C contains impurities. C. Both Unknown A and B are pure substances....
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 15 pts USING THE PROVIDED INFORMATION, DETERMINE THE IDENTITY OF THE UNKNOWN BACTERIA BASED UPON THE FIVE SPECIES UTILIZED IN THE LABORATORY THIS SESSION AND ANSWER THE PROVIDED QUESTIONS GRAM'S STAIN RESULT UNKNOWN GRAM'S STAIN ACID-FAST STAIN RESULT UNKNOWN VL ACID FAST STAIN ACID-FAST STAIN RESULT UNKNOWN #1 ACID-FAST STAIN REACTION CATALASE TEST RESULT UNKNOWN 21 CATALASE REACTION 1 What is the identity of your unknow sample based on the results seen in the above images? What is...
Post lab questions for chromatography and melting point lab. i
have a few ideas of what the answers to these questions should be,
but I would like to double check. if anyone can help me, that would
be so awesome. Thank you!
A student cools a sample in a capillary tube after melting it. Upon attempting to determine the melting point on the same sample, the student does not obtain the same melting point. Why? A student places his TLC...
The melting point of an unknown solid is determined to be 53°C. What is this temperature on the Fahrenheit and Kelvin scales? Temperature Temperature K
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