#41. Acetone, shown in the image below, is a laboratory solvent that is also commonly used...
#41. Acetone, shown in the image below, is a laboratory solvent that is also commonly used as nail polish remover.
Answer the following questions about acetone in the essay blank below:
a. If you spill some acetone on you hand, the spot will soon feel cold. Why?
b. If you spill some acetone on a lab bench, it evaporates much faster than the same amount of acetone in a test tube. Why?
Homework Answers
Answer a: Acetone is a volatile liquid. It evaporates as soon as it comes in contact of atmosphere. As we know evaporation is n endothermic process i.e., it absorbs heat from surrounding and gets evaporated. Therefore, when evaporating form our hand it feels cold.
Answer b: Acetone evaporates much faster from bench than in the test tube because it comes in contact with surrounding more effectively when spilled on bench and the surface area of the process is also increased which increases the rate of evaporation.
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#41. Acetone, shown in the image below, is a laboratory solvent
that is also commonly used...
UESTION 3 #41. Acetone, shown in the image below, is a laboratory solvent that is also...
UESTION 3 #41. Acetone, shown in the image below, is a laboratory solvent that is also commonly used as nail polish remover. H₃ C CH₃ Answer the following questions about acetone in the essay blank below at you spill some acetone on you hand the spot will soon feel cold. Why? You So some acetone on a bench, evaporates much faster than the same amount of acetone in a test tube Why iba press ALT+F10: (PO) or ALTUEN+F 10 Mac)....
OBJECTIVE 3 OBJECTIVE 4 41. Acetone, CH3COCH3, is a laboratory solvent that is also commonly used...
OBJECTIVE 3 OBJECTIVE 4 41. Acetone, CH3COCH3, is a laboratory solvent that is also commonly used as a nail polish remover. a. Describe the submicroscopic events taking place at the surface of liquid acetone when it evaporates. b. Do all of the acetone molecules moving away from the surface of the liquid escape? If not, why not? What three criteria must be met for a molecule to escape from the surface of the liquid and move into the gas phase?...
Acetone, whose structure is shown below, is a laboratory solvent that is also commonly used as...
Acetone, whose structure is shown below, is a laboratory solvent that is also commonly used as a nail polish remover. What is the strongest intermolecular force in a sample of pure acetone? What is the strongest intermolecular force that occurs between acetone and water?
QUESTION 2 Acetone, whose structure is shown below, is a laboratory solvent that is also commonly...
QUESTION 2 Acetone, whose structure is shown below, is a laboratory solvent that is also commonly used as a nail polish remover H₃ C CH₃ What is the strongest intermolecular force in a sample of pure acetone? What is the strongest intermolecular force that occurs between acetone and water?
1) A chemical reaction and a table of bond dissociation energies are shown below. H3C H...
1) A chemical reaction and a table of bond dissociation energies are shown below. H3C H НАС + H2O HOZCHz H2C H acid HzC catalyst Bond BDE (KJ/mol) Bond BDE (KJ/mol) Csp3-H 410 Csp2-Csp2 sigma 418 Csp2-H 427 Csp2-Csp2 pi 264 Csp-H 523 C-O sigma 355 Csp3-Csp3 368 C-O pi 261 Csp2-Csp3 418 HO-H 460 a) Calculate the enthalpy change (AH) for the reaction. Remember to include the sign and units. b) If you touched the outside of the reaction...
than other labs. These are toxicity, volatility, and flammability. We routinely use toxic organic solvents like...
than other labs. These are toxicity, volatility, and flammability. We routinely use toxic organic solvents like methanol and acetone that are volatile (have low boiling points), but even solid organic materials can produce vapors that may be toxic. Furthermore, organic materials are flammable, and solvent vapors in the air can and do produce explosive mixtures. You should take some general precautions when doing organic chemistry: Do not get solutions on your skin. You do not need to always wear gloves...
if applicacable, please write clear stepwise mechanism for all synthetic transformations, showing important internediates where appropriate....
if applicacable, please write clear stepwise mechanism for all
synthetic transformations, showing important internediates where
appropriate. only do this if applicable for this lab.
Experiment SD Column Chromatography Running the Reaction. Once sodium borohydride has been added to the reaction meture Isee next paragraph take samples at the times just indicated. Because this must be done in such a short time you must be well prepared before starting the reaction. One person should be the timekeeper, and the other person...
please answer all parts I am trying to check my answers. Recrystallization of Acetanilide Recrystallization is...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
QUESTIONS TO ANSWER: Prepare a table of all chemicals used with the structure and purpose of...
QUESTIONS TO ANSWER:
Prepare a table of all chemicals used with the structure and
purpose of each.
Calculate the theoretical yield by finding limiting reactant of
the experiment by converting reactants to product (remember to show
all calculations used)
Calculate the percent yield using the limiting reactant
Calculate the Rf for triphenylmethanol. If there are two dots,
determine which one is triphenylmethanol.. ( I did not provide
data. Please let me know how I Would do this if I did)...
UESTION 3 #41. Acetone, shown in the image below, is a laboratory solvent that is also commonly used as nail polish remover. H₃ C CH₃ Answer the following questions about acetone in the essay blank below at you spill some acetone on you hand the spot will soon feel cold. Why? You So some acetone on a bench, evaporates much faster than the same amount of acetone in a test tube Why iba press ALT+F10: (PO) or ALTUEN+F 10 Mac)....
OBJECTIVE 3 OBJECTIVE 4 41. Acetone, CH3COCH3, is a laboratory solvent that is also commonly used as a nail polish remover. a. Describe the submicroscopic events taking place at the surface of liquid acetone when it evaporates. b. Do all of the acetone molecules moving away from the surface of the liquid escape? If not, why not? What three criteria must be met for a molecule to escape from the surface of the liquid and move into the gas phase?...
QUESTION 2 Acetone, whose structure is shown below, is a laboratory solvent that is also commonly used as a nail polish remover H₃ C CH₃ What is the strongest intermolecular force in a sample of pure acetone? What is the strongest intermolecular force that occurs between acetone and water?
1) A chemical reaction and a table of bond dissociation energies are shown below. H3C H НАС + H2O HOZCHz H2C H acid HzC catalyst Bond BDE (KJ/mol) Bond BDE (KJ/mol) Csp3-H 410 Csp2-Csp2 sigma 418 Csp2-H 427 Csp2-Csp2 pi 264 Csp-H 523 C-O sigma 355 Csp3-Csp3 368 C-O pi 261 Csp2-Csp3 418 HO-H 460 a) Calculate the enthalpy change (AH) for the reaction. Remember to include the sign and units. b) If you touched the outside of the reaction...
than other labs. These are toxicity, volatility, and flammability. We routinely use toxic organic solvents like methanol and acetone that are volatile (have low boiling points), but even solid organic materials can produce vapors that may be toxic. Furthermore, organic materials are flammable, and solvent vapors in the air can and do produce explosive mixtures. You should take some general precautions when doing organic chemistry: Do not get solutions on your skin. You do not need to always wear gloves...
if applicacable, please write clear stepwise mechanism for all
synthetic transformations, showing important internediates where
appropriate. only do this if applicable for this lab.
Experiment SD Column Chromatography Running the Reaction. Once sodium borohydride has been added to the reaction meture Isee next paragraph take samples at the times just indicated. Because this must be done in such a short time you must be well prepared before starting the reaction. One person should be the timekeeper, and the other person...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
QUESTIONS TO ANSWER:
Prepare a table of all chemicals used with the structure and
purpose of each.
Calculate the theoretical yield by finding limiting reactant of
the experiment by converting reactants to product (remember to show
all calculations used)
Calculate the percent yield using the limiting reactant
Calculate the Rf for triphenylmethanol. If there are two dots,
determine which one is triphenylmethanol.. ( I did not provide
data. Please let me know how I Would do this if I did)...
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