Homework Answers
1) A)if we use the pure water as a reaction solvent there is no effect on experiment.no errors are occured.
B) in this reaction 4:1 ratio of vanilline and sodium borohydride are required.you are using the excess 100% NaBH4 means the product contains some amount of NaBH4 also. here vanilline is the limiting reagent.
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Describe and explain the possible effect on your results if the following experimental errors or variations...
Describe and explain the possible effect on your results of the following experimental errors or variations....
Describe and explain the possible effect on your results of the following experimental errors or variations. a) you used a solution cell with a 0.1mm spacer for the infrared spectrum, b) you dissolved your unknown in petroleum ether for the UV analysis c) There was no deuterochloroform available for the NMR sample so you used ordinary chloroform
tell how each of the following experimental errors will affect your experimental results (...
tell how each of the following experimental errors will affect your experimental results ( yield,purity,or both) and explain why.a)you failed to dry the product completely.b) you used enough water to recrystallize phenacetin, but your unknown was acetanilide.c)inexperiment 2, you didn't extract all of the aspirin from the dichloromethane solution.
concentration if the following errors occurred: Explain the effect on your calculated acid concentration nel in...
concentration if the following errors occurred: Explain the effect on your calculated acid concentration nel in the buret during the titration. 1. A student left his or her buret funnel in the buret durin 2. A student started their titration with air bubbles in the buret tip. 3. The dilute HCl was over-diluted in the volumetric flask. 4. The flask that the student added the dilute acid to before the titration was wet.
POST-LAB QUESTIONS Explain the effect on your calculated acid concentration if the following errors occurred 1....
POST-LAB QUESTIONS Explain the effect on your calculated acid concentration if the following errors occurred 1. A student left his or her buret funnel in the buret during the titration. 2. A student started their titration with air bubbles in the buret tip. 3. The dilute HCl was over-diluted in the volumetric flask. 4. The flask that the student added the dilute acid to before the titration was wet. Titration of an unknown Acid
Consider the effect on your experimental results of the following and explain what the effect would...
Consider the
effect on your experimental results of the following and explain
what the effect would be and why.
a) The reaction of
BB- and OCl- turned out to be strongly
exothermic.
i don't really know
how this would change the absorbance levels over time. Is this
reaction already exotermic or is it endothermic.
results
We were unable to transcribe this imageD E F G H I J K L M N O P 1 Time (s) Absorbance In (Absorbance)...
LABORATORY 8 Post-Lab 1. Explain how each of the following errors would have altered your results....
LABORATORY 8 Post-Lab 1. Explain how each of the following errors would have altered your results. Clearly explain why your calculated answer would be high, low, or unchanged. (A single word answer is not acceptable.) a. You decided to take the pH after each addition of 5.0 mL of NaOH rather than after every 0.5 mL during the neutralization of your acid sample. b. While using the Half Volume method, your solution was dark pink (you overshot the endpoint) and...
NMR IR CAN YOU PLEASE ANSWER AS SOON AS POSSIBLE THANK YOU PLEASE EXPLAIN IT IN DETAIL THANK YOU Experimental Data Only report the IR absorptions that provide diagnosis...
NMR
IR
CAN YOU PLEASE ANSWER AS SOON AS POSSIBLE THANK
YOU
PLEASE EXPLAIN IT IN DETAIL THANK YOU
Experimental Data Only report the IR absorptions that provide diagnosis for the major functional groups. Copies of your spectra will be included in your lab report with this information written on the spectra. However, the information should also be included in the body of the report in a text format similar to the example given below IR cm1: 1735 (C-o); MS:...
cant figure out number FOUR please thanks for your help Experiment 5 Preparation of Synthetic Banana...
cant figure out number FOUR please thanks for your help
Experiment 5 Preparation of Synthetic Banana Oil Compare the sum of these estimated losses with your actual product loss and try to account for any significant differences. 2/ What gas escaped during the sodium bicarbonate washing? Write bal- anced equations for two reactions that took place during this operation. 3. (a) Calculate the atom economy and reaction efficiency of your synthe- sis of isopentyl acetate. (b) Tell how the procedure...
question 2 and 6 thabk you Exercises 1. (a) Calculate the volume of 6 M NaOH...
question 2 and 6 thabk you
Exercises 1. (a) Calculate the volume of 6 M NaOH required to react completely with the amount of methyl salicylate you used. How much of the 6 M NaOH that you used was in excess of the theoretical amount? (b) What volume of 3 M H SO is needed to neutralize all of the disodium salicylate and the excess NaOH present after the initial reaction? How much sulfuric acid was in excess? 2. Refer...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
concentration if the following errors occurred: Explain the effect on your calculated acid concentration nel in the buret during the titration. 1. A student left his or her buret funnel in the buret durin 2. A student started their titration with air bubbles in the buret tip. 3. The dilute HCl was over-diluted in the volumetric flask. 4. The flask that the student added the dilute acid to before the titration was wet.
POST-LAB QUESTIONS Explain the effect on your calculated acid concentration if the following errors occurred 1. A student left his or her buret funnel in the buret during the titration. 2. A student started their titration with air bubbles in the buret tip. 3. The dilute HCl was over-diluted in the volumetric flask. 4. The flask that the student added the dilute acid to before the titration was wet. Titration of an unknown Acid
Consider the
effect on your experimental results of the following and explain
what the effect would be and why.
a) The reaction of
BB- and OCl- turned out to be strongly
exothermic.
i don't really know
how this would change the absorbance levels over time. Is this
reaction already exotermic or is it endothermic.
results
We were unable to transcribe this imageD E F G H I J K L M N O P 1 Time (s) Absorbance In (Absorbance)...
LABORATORY 8 Post-Lab 1. Explain how each of the following errors would have altered your results. Clearly explain why your calculated answer would be high, low, or unchanged. (A single word answer is not acceptable.) a. You decided to take the pH after each addition of 5.0 mL of NaOH rather than after every 0.5 mL during the neutralization of your acid sample. b. While using the Half Volume method, your solution was dark pink (you overshot the endpoint) and...
NMR
IR
CAN YOU PLEASE ANSWER AS SOON AS POSSIBLE THANK
YOU
PLEASE EXPLAIN IT IN DETAIL THANK YOU
Experimental Data Only report the IR absorptions that provide diagnosis for the major functional groups. Copies of your spectra will be included in your lab report with this information written on the spectra. However, the information should also be included in the body of the report in a text format similar to the example given below IR cm1: 1735 (C-o); MS:...
cant figure out number FOUR please thanks for your help
Experiment 5 Preparation of Synthetic Banana Oil Compare the sum of these estimated losses with your actual product loss and try to account for any significant differences. 2/ What gas escaped during the sodium bicarbonate washing? Write bal- anced equations for two reactions that took place during this operation. 3. (a) Calculate the atom economy and reaction efficiency of your synthe- sis of isopentyl acetate. (b) Tell how the procedure...
question 2 and 6 thabk you
Exercises 1. (a) Calculate the volume of 6 M NaOH required to react completely with the amount of methyl salicylate you used. How much of the 6 M NaOH that you used was in excess of the theoretical amount? (b) What volume of 3 M H SO is needed to neutralize all of the disodium salicylate and the excess NaOH present after the initial reaction? How much sulfuric acid was in excess? 2. Refer...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
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