Homework Answers
Add Answer to:
Cinnamic acid and urea melt at 133°C. The melting point of an unknown is found to...
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...
Hexachlorobenzene has a literature melting point of 231 ºC. What would be a reasonable result when...
Hexachlorobenzene has a literature melting point of 231 ºC. What would be a reasonable result when melting an impure sample of hexachlorobenzene? It would start melting around 229 ºC and finish melting around 233 ºC. It would start melting around 225 ºC, and finish melting around 230º C. The impurity would melt at whatever temperature is normal for that impurity, but the hexachlorobenzene would melt right at 231 ºC . It would melt right at a temperature lower than the...
Urea and Cinnamic acid. Write the important chemical and safety data for lab. Write the structure,...
Urea and Cinnamic acid. Write the important chemical and safety data for lab. Write the structure, compound, melting point, molecular weight, and safety.
3. A sample taken on a melting point apparatus was found to melt at 134.2-135.0°C. The...
3. A sample taken on a melting point apparatus was found to melt at 134.2-135.0°C. The compound is either malonic acid, or acetylsalicylic acid. Assuming availability of malonic acid and acetylsalicylic acid, as well as the sample, how would you determine if the sample was malonic acid or acetylsalicylic acid? (Use only the concepts introduced in this experiment, and describe all expected observations!)
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....
- 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...
Station 5 Compounds A, B, and C all have a melting point range of 94-96 °C. When mixed together, A and B melt at 82-95 °C. When mixed together, A and C melt at 95-97 °C a. Are compounds A and B i...
Station 5 Compounds A, B, and C all have a melting point range of 94-96 °C. When mixed together, A and B melt at 82-95 °C. When mixed together, A and C melt at 95-97 °C a. Are compounds A and B identical (yes or no) b. Are compounds A and C identical (yes or no)? c. What would you expect the melting point range for a mixture of B and C to be?
Station 5 Compounds A, B, and...
What would you expect the observed boiling point to be at 10 torrs of a liquid...
What would you expect the observed boiling point to be at 10 torrs of a liquid which has a boiling point of 300 °C at 760 torrs? (Use Figure) Would it be possible to establish the composition of an unknown binary mixture of two substances from mixture melting-point data? Explain. After recording the R values using as a solvent system ethyl acetate and hexane (1:4), determine what solvent system is needed to obtain values between 0.3-0.4 for each of the...
Bromination of Trans-Cinnamic Acid Lab Question: The melting point of my product is 115-118C. The percent...
Bromination of Trans-Cinnamic Acid Lab Question: The melting point of my product is 115-118C. The percent yield was 19.2%. Is the product erythro or threo? From the melting point, I am guessing it is the threo. But wasn't the product supposed to be erythro? Can someone explain this result? And what is a possible reason why the yield is very low?
The melting point of bulk gold is 1064 C. In a melting experiment, it was found...
The melting point of bulk gold is 1064 C. In a melting experiment, it was found that a gold nanocrystal of 5.0 nm in diameter has a melting point of 817 C, and an unknown gold nanocrystal has a melting point of 500 C. Estimate the particle size of this unknown gold sample.
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. A sample taken on a melting point apparatus was found to melt at 134.2-135.0°C. The compound is either malonic acid, or acetylsalicylic acid. Assuming availability of malonic acid and acetylsalicylic acid, as well as the sample, how would you determine if the sample was malonic acid or acetylsalicylic acid? (Use only the concepts introduced in this experiment, and describe all expected observations!)
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....
- 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...
Station 5 Compounds A, B, and C all have a melting point range of 94-96 °C. When mixed together, A and B melt at 82-95 °C. When mixed together, A and C melt at 95-97 °C a. Are compounds A and B identical (yes or no) b. Are compounds A and C identical (yes or no)? c. What would you expect the melting point range for a mixture of B and C to be?
Station 5 Compounds A, B, and...
Most questions answered within 3 hours.
-
A z-score
communicates a raw score’s "relative standing"
under the normal curve in relation to:
asked 5 minutes ago -
An object is vibrating on a spring with the following equation
of motion:
?=(30 ??)cos((2?)/(160)?)
a)...
asked 4 minutes ago -
Vulcan Flyovers offers scenic overflights of Mount St. Helens,
the volcano in Washington State that explosively...
asked 7 minutes ago -
If organizations do not adapt fast enough and move incrementally
from the twentieth-century model to the...
asked 8 minutes ago -
A helium balloon with 2.5L of gas has a gauge pressure of 10,000
Pa. The balloon...
asked 12 minutes ago -
What is responsible for Jupiter's enormous magnetic field?
asked 27 minutes ago -
At the end of the year, a company offered to buy 5,000 units of
a product...
asked 29 minutes ago -
Implement C++ program for each of the following.
Let D = [-48, -14, -8, 0, 1,...
asked 49 minutes ago -
Consider a labor market in which LD = 400 – 4W and LS = 250 +...
asked 1 hour ago -
Let’s say you are teaching a typically-developing young child
how to eat with a spoon. Describe...
asked 46 minutes ago -
Ask Your Teacher A toy gun uses a spring to project a 5.6-g soft
rubber sphere...
asked 58 minutes ago -
*****DO NOT ANSWER THIS QUESTION IF YOU DON'T
KNOW*******
Question - PERSONAL DEVELOPMENT ESSAY and Detailed...
asked 1 hour ago