1 mesa-stilbene dibromide + 2 KOH --------> 1 Diphenylacetylene + 2 H2O + 2 KBr The...
1 mesa-stilbene dibromide + 2 KOH --------> 1 Diphenylacetylene + 2 H2O + 2 KBr
- The reaction is run on 0.0015 mole of meso-stilbene dibromide. Calculate how many grams are needed.
- A 50% molar excess of KOH over the stoichiometrically required amount is used. KOH pellets (~85% KOH content) typically weigh about 0.1 g and are not easily divided. Because a considerable excess is used, the precise mass is not critical. Determine the number of pellets required to give roughly the calculated number of moles. To begin the calculation, find the stoichiometrically required number of moles based on the balanced equation.
- Calculate the expected yield of the product, diphenylacetylene, based on the limiting reactant.
Homework Answers
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1 mesa-stilbene dibromide + 2 KOH --------> 1
Diphenylacetylene + 2 H2O + 2 KBr
The...
lab G: (e)- stilbene, pyridinium tribromide, meso-stilbene dibromide, potassium hydroxide, triethylene glycol, diphenylacetylene, ethanol Mole Table...
lab G: (e)- stilbene, pyridinium tribromide, meso-stilbene
dibromide, potassium hydroxide, triethylene glycol,
diphenylacetylene, ethanol
Mole Table Drawn immediately beneath the Overall Reaction, the Mole Table is used to calcu late the theoretical yield of your product using stoich iometry. All calculations are to be shown in the "Calculations" section. Each column refers to the structure drawn above it. Please cite the source of Mole Table information stated in the Mole Table - refer to the example below for format. As...
please help with number 6! 1.(2) What is the meaning of “E” in E-stilbene? 2.(4) What...
please help with number 6!
1.(2) What is the meaning of “E” in E-stilbene? 2.(4) What functional groups are present in E-stilbene? 3.(2) Write the reaction that occurs between E-stilbene and bromine. 4.(4) Write the mechanism for the addition of bromine to €- stilbene to give meso-stilbene dibromide via the intermediate cyclic bromonium ion. 5.(2) Which reagent, E-sitlbene or bromine, acts as the nucleophile in this reaction? Which reagent is the electrophile? 6.(4) Calculate the theoretical yield of meso-stilbene dibromide...
1st picture is the questions and the next two pictures are the experiment the questions are...
1st picture is the questions and the next two pictures are the
experiment the questions are based off of
Prelab Questions 1) Based on the Material Safety Data Sheets (MSDS) for the compounds, which of the compounds in this experiment is the most hazardous, and why? 2) Fill in the reagent table below. Make sure you correctly calculate the molar amounts of your materials. Name Formula Mol.-eq. Mw mmol Density/Conc. Amount 10 400 mg Meso-Stilbene Dibromide Potassium Hydroxide 5.75 Triethylene...
complete the following table Name molar mass (g/mol) 2-bromoheptane 2-bromohen cacluate from the formula / structure...
complete the following table
Name molar mass (g/mol) 2-bromoheptane 2-bromohen cacluate from the formula / structure or look up in the table on page 77 density = ? g/ml from PC table 0.22 mL-?g Alkoxide base cacluate from the formula / structure or look up in the table on page 77 heptene isomers cacluate from the formula / structure or look up in the table on page 77 other you calculate you calculate 7.17 target amount target mmoles (1 mmole...
CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH...
CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH solution would react completely with 25.8 ml. of 0.198 M HCl according to the following cquation? HCI+KOH --->KCI+H.O a) 86.4 ml. b) 25.7 ml. c) 38.7 ml d) 17.2 ml. 2. Which one of the following is a strong soluble base? a) Ni(OH): b) Mg(OH): c) RLOH d) ChOH) c) Fe(OH) 3. Which one of the following is a strong acid? a) HF b)...
Pre-Lab Assignment 1) Draw the reaction mechanism for the reaction. 2) Determine the limiting reagent. Procedure...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
i uploaded everything that was given. Where would I find the experiemental values? Complete the calcula...
i
uploaded everything that was given. Where would I find the
experiemental values?
Complete the calculation summary below. READ THE EXPERIMENTAL DISCUSSION FIRST! REPORT ALL ANSWERS TO THE CORRECT SIGNIFICANT FIGURES. SHOW CALCULATION SET-UP on the next page. PART B: Molarity Determination via Solution Stoichiometry 7.625 g Mass of Empty 50 mL Beaker 7.976 g Mass of Beaker and NaCl (final heating) Mass of NaCl Produced (Experimental Yield of NaCl) moles Moles of Na,CO, Consumed 0.00500 Liter Volume of Na,CO,...
lab G: (e)- stilbene, pyridinium tribromide, meso-stilbene
dibromide, potassium hydroxide, triethylene glycol,
diphenylacetylene, ethanol
Mole Table Drawn immediately beneath the Overall Reaction, the Mole Table is used to calcu late the theoretical yield of your product using stoich iometry. All calculations are to be shown in the "Calculations" section. Each column refers to the structure drawn above it. Please cite the source of Mole Table information stated in the Mole Table - refer to the example below for format. As...
please help with number 6!
1.(2) What is the meaning of “E” in E-stilbene? 2.(4) What functional groups are present in E-stilbene? 3.(2) Write the reaction that occurs between E-stilbene and bromine. 4.(4) Write the mechanism for the addition of bromine to €- stilbene to give meso-stilbene dibromide via the intermediate cyclic bromonium ion. 5.(2) Which reagent, E-sitlbene or bromine, acts as the nucleophile in this reaction? Which reagent is the electrophile? 6.(4) Calculate the theoretical yield of meso-stilbene dibromide...
1st picture is the questions and the next two pictures are the
experiment the questions are based off of
Prelab Questions 1) Based on the Material Safety Data Sheets (MSDS) for the compounds, which of the compounds in this experiment is the most hazardous, and why? 2) Fill in the reagent table below. Make sure you correctly calculate the molar amounts of your materials. Name Formula Mol.-eq. Mw mmol Density/Conc. Amount 10 400 mg Meso-Stilbene Dibromide Potassium Hydroxide 5.75 Triethylene...
complete the following table
Name molar mass (g/mol) 2-bromoheptane 2-bromohen cacluate from the formula / structure or look up in the table on page 77 density = ? g/ml from PC table 0.22 mL-?g Alkoxide base cacluate from the formula / structure or look up in the table on page 77 heptene isomers cacluate from the formula / structure or look up in the table on page 77 other you calculate you calculate 7.17 target amount target mmoles (1 mmole...
CHEM 1033, Sample Exam II (Homework) Chapters 3,4,6 Name: 1. What volume of 0.132 M KOH solution would react completely with 25.8 ml. of 0.198 M HCl according to the following cquation? HCI+KOH --->KCI+H.O a) 86.4 ml. b) 25.7 ml. c) 38.7 ml d) 17.2 ml. 2. Which one of the following is a strong soluble base? a) Ni(OH): b) Mg(OH): c) RLOH d) ChOH) c) Fe(OH) 3. Which one of the following is a strong acid? a) HF b)...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
i
uploaded everything that was given. Where would I find the
experiemental values?
Complete the calculation summary below. READ THE EXPERIMENTAL DISCUSSION FIRST! REPORT ALL ANSWERS TO THE CORRECT SIGNIFICANT FIGURES. SHOW CALCULATION SET-UP on the next page. PART B: Molarity Determination via Solution Stoichiometry 7.625 g Mass of Empty 50 mL Beaker 7.976 g Mass of Beaker and NaCl (final heating) Mass of NaCl Produced (Experimental Yield of NaCl) moles Moles of Na,CO, Consumed 0.00500 Liter Volume of Na,CO,...
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