Homework Answers
gradually pour (wine, port, or another liquid) from one container into another, typically in order to separate out sediment.
Answer- Pour the liquid off the precipitate
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Question 7 1 pts What does it mean to decant? Pour the liquid off the precipitate...
3. a. What happens in Part Fl if conc NaOH is substituted for conc NH4OH? b....
3. a. What happens in Part Fl if conc NaOH is substituted for conc NH4OH? b. What happens to the precipitate in Part F1 if conc HCl is added? 3. Dissolve the Cu2+ and Bil Sulfides. Add 15 drops of 6 M HNO3 to the precipitate from Part E.2 and carefully heat with a direct flame until the precipitates dissolve. (Caution: make sure the test tube is pointed away from all other students while heating). Cool and centrifuge. Save the...
What is the reaction product(s) of oleic acid & sodium methoxide? Show the structure(s). Part A:...
What is the reaction product(s) of oleic acid & sodium methoxide? Show the structure(s). Part A: Acid Catalyzed Fischer Esterification of Free Fatty Acids Add 20 mL of canola oil and a magnetic stir bar to a 125-mL Erlenmeyer flask, and place the flask on a magnetic stirring plate. Add 2–3 mL of methanol and up to three drops of concentrated sulfuric acid Perform this step with caution, as this is a strong acid! Immerse a thermometer into the reaction...
PRE-LABORATORY QUESTIONS NAME: 1. According to the experimental procedure written above which cation in your sample...
PRE-LABORATORY QUESTIONS NAME: 1. According to the experimental procedure written above which cation in your sample should be identified first if it is indeed in the sample? 2. In what phase is the first cation supposed to be identified, in solid or liquid phase? And in what color? 3. According to the experimental procedure written above which cation in your sample should be identified second if it is indeed in the sample? 4. In what phase is the second cation...
1 Reaction C: Copper(II) Hydroxide to Copper(IT) Oxide Observations: The solntich goes from a light blue...
1 Reaction C: Copper(II) Hydroxide to Copper(IT) Oxide Observations: The solntich goes from a light blue to a dark blue. when heated the solution turns to a green/black color. Balanced Molecular Equation: Balanced Net lonie Equation: Reaction D: Copper(IT) Oxide to Copper(II) Sulfate Observations: "The back sond is dissolved in the acid. This creates a light blue / Clear solurich Balanced Molecular Equation: Balanced Net Ionic Equation: Reaction E: Copper(II) Sulfate to Copper Metal (and Dissolution of excess Mg) Observations:...
7. If the hot solution in step 2 cooled to room temperature before centrifuging, how would...
7. If the hot solution in step 2 cooled to room temperature before centrifuging, how would the lead test be affected? You must be specific in your answer and include a clear chemical reason. Confirmation of Lead 2. Add 2 mL of water to the solids in test tube from step 1. Place the test tube in a boiling water bath for 5 minutes. Remove from the bath and centrifuge while still hot. If there are no solids, you have...
Question: Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should...
Question:
Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should be performed concurrently on the known and the unknown solutions. Volumes are approximate. All work excepting the centrifugation should be done in the fume hood 1. To about 2. mL of your sample in a test tube, add 5 drops (-0.2 mL) of 6 M HCl(a). Mix well and centrifuge. Decant the clear liquid into a clean test tube and save it for Step...
Draw an extraction flow chart for the Extraction experiment you completed. experiment below Separation of a...
Draw an extraction flow chart for the Extraction experiment you completed. experiment below Separation of a Benzoic Acid/Biphenyl Mixture by Acid-Base Extraction Prepare the solution to be extracted by dissolving 2.5 g of a 1:1 mixture of benzoic acid/ biphenyl in 25 mL of tert-butyl methyl ether (MTBE) . Using a 125 mL separatory funnel extract the ether solution with a mixture containing 10 mL of distilled water and 15 mL of saturated NaHCO3 . Repeat After removing the aqueous...
Question 1 1 pts What is the purpose of utilizing brine (saturated sodium chloride solution) during...
Question 1 1 pts What is the purpose of utilizing brine (saturated sodium chloride solution) during the liquid-liquid extraction portion of the bromohydrination of cyclohexene? To lower the solubility of organic molecules in the organic layer. To stabilize the carbocation formed during the course of the reactions. To remove excess water from the organic layer of the reaction. To ensure that enough water is present for the reaction to generate an alcohol. Question 2 1 pts Which of the following...
Hello I would appreciate it if I could get the answer to these questions. Thank you!...
Hello I would appreciate it if I could get the answer
to these questions. Thank you!
Question 5 2 pts You should allow your solute to boil off with the solvent during the heating phase of recrystallization. O True False Previous 2 pts Question 7 Identify the strongest IMAF present in a pure solution of this compound. ion-dipole interactions Dipole-Dipole interactions hydrogen bonding London dispersion forces Question 11 2 pts The used, unbroken capillary tube containing chemicals goes into the...?...
noinizdle dn Draw a flow sheet to describe the separation procedure. (10 pts) doprleoudenagne aded 6....
noinizdle dn Draw a flow sheet to describe the separation procedure. (10 pts) doprleoudenagne aded 6. Are several small-scale extractions more efficient than one large-scale extraction? Why? (10 pts) 7. Why the upper layer should be poured out from the top of the separatory funnel but not be drained from the stopcock? (10 pts) Extraction: Separation of a Neutral and Basic Substances 1 Dissolve 2 g of a mixture of naphthalene and 4-chloroaniline in 20 mL of ethyl ether and...
3. a. What happens in Part Fl if conc NaOH is substituted for conc NH4OH? b. What happens to the precipitate in Part F1 if conc HCl is added? 3. Dissolve the Cu2+ and Bil Sulfides. Add 15 drops of 6 M HNO3 to the precipitate from Part E.2 and carefully heat with a direct flame until the precipitates dissolve. (Caution: make sure the test tube is pointed away from all other students while heating). Cool and centrifuge. Save the...
PRE-LABORATORY QUESTIONS NAME: 1. According to the experimental procedure written above which cation in your sample should be identified first if it is indeed in the sample? 2. In what phase is the first cation supposed to be identified, in solid or liquid phase? And in what color? 3. According to the experimental procedure written above which cation in your sample should be identified second if it is indeed in the sample? 4. In what phase is the second cation...
1 Reaction C: Copper(II) Hydroxide to Copper(IT) Oxide Observations: The solntich goes from a light blue to a dark blue. when heated the solution turns to a green/black color. Balanced Molecular Equation: Balanced Net lonie Equation: Reaction D: Copper(IT) Oxide to Copper(II) Sulfate Observations: "The back sond is dissolved in the acid. This creates a light blue / Clear solurich Balanced Molecular Equation: Balanced Net Ionic Equation: Reaction E: Copper(II) Sulfate to Copper Metal (and Dissolution of excess Mg) Observations:...
7. If the hot solution in step 2 cooled to room temperature before centrifuging, how would the lead test be affected? You must be specific in your answer and include a clear chemical reason. Confirmation of Lead 2. Add 2 mL of water to the solids in test tube from step 1. Place the test tube in a boiling water bath for 5 minutes. Remove from the bath and centrifuge while still hot. If there are no solids, you have...
Question:
Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should be performed concurrently on the known and the unknown solutions. Volumes are approximate. All work excepting the centrifugation should be done in the fume hood 1. To about 2. mL of your sample in a test tube, add 5 drops (-0.2 mL) of 6 M HCl(a). Mix well and centrifuge. Decant the clear liquid into a clean test tube and save it for Step...
Question 1 1 pts What is the purpose of utilizing brine (saturated sodium chloride solution) during the liquid-liquid extraction portion of the bromohydrination of cyclohexene? To lower the solubility of organic molecules in the organic layer. To stabilize the carbocation formed during the course of the reactions. To remove excess water from the organic layer of the reaction. To ensure that enough water is present for the reaction to generate an alcohol. Question 2 1 pts Which of the following...
Hello I would appreciate it if I could get the answer
to these questions. Thank you!
Question 5 2 pts You should allow your solute to boil off with the solvent during the heating phase of recrystallization. O True False Previous 2 pts Question 7 Identify the strongest IMAF present in a pure solution of this compound. ion-dipole interactions Dipole-Dipole interactions hydrogen bonding London dispersion forces Question 11 2 pts The used, unbroken capillary tube containing chemicals goes into the...?...
noinizdle dn Draw a flow sheet to describe the separation procedure. (10 pts) doprleoudenagne aded 6. Are several small-scale extractions more efficient than one large-scale extraction? Why? (10 pts) 7. Why the upper layer should be poured out from the top of the separatory funnel but not be drained from the stopcock? (10 pts) Extraction: Separation of a Neutral and Basic Substances 1 Dissolve 2 g of a mixture of naphthalene and 4-chloroaniline in 20 mL of ethyl ether and...
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