Homework Answers
% composition = (mass of particular component/ total mass of sample)*100
% sand= (0.650/2.502)*100 = 25.97
% acetanilide = (0.776/2.502)*100 =31.03
% salt = (1.076/2.502)*100 =43.00
The melting point of acetanilide is 114°C
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experiment 4
report sheet and questions
seperating a mixture, recrystallization
EXPERIMENT 4 Report Sheet and Questions...
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...
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...
1)A student purified the acetanilide by using recrystalization experiment and he got the following results. Based...
1)A student purified the acetanilide by using recrystalization experiment and he got the following results. Based on the following results answer the questions. Starting weight of Acetanilide: 1.324g. Melting Point of Starting acetanilide: 98.2-105.3 degrees C. Weight obtained after recrystalization 0.954 g. Melting Point of recrystallized acetanilide:112.2-114.3 degrees C. Melting point of pure acetanilide (Literature Value); 114.3 degrees C. a) Calculate the % yeild of recrystallization experiment? b) Explain the purity of recrystallized product? 2) How did you check the...
Question 2,3,4 please. ESTIONS: 1. Many students do not recover 100% of the original mixture. Describe...
Question 2,3,4 please.
ESTIONS: 1. Many students do not recover 100% of the original mixture. Describe at least two possible problems that could cause less than 100% recovery of the mixture. 2. A student received a mixture that actually contained 50.0% salt and 50.0% sand. At the end of the experiment, this student calculated that his sample was composed of 45.2% salt and 54.8% sand. What might he have done (or not done correctly) during the experiment to cause this...
Recrystallization of Acetanilide was conducted using water as our solvent. First we had to choose a...
Recrystallization of Acetanilide was conducted using water as our solvent. First we had to choose a solvent based (water was chosen as our solvent due to it not dissolving acetanilide at room temp but dissolved it when heated) Then we performed recrystallizaation, vacuum filtration and then melting point measurements. For the post lab discussion for recrystallization of acetanilide report we have to address several different arguments. The ones below I'm not sure what to focus on to completely defend what...
i need help with data Analysis Experiment & Report Sheet Limiting Reactant Desk No. to Lab...
i need help with data Analysis
Experiment & Report Sheet Limiting Reactant Desk No. to Lab Sec. - Lab Sec. Name Precipitation of CaC,OH,O from the Salt Mixture Unknown number_ 2 I Mass of beaker() Mass of beaker and salt mixture (8) Trial Trial 2 3. Mass of salt mixture (8) 4. Mass of filter paper() 5. Mass of filter paper and product after air-dried roven-dried (e) 6. Mass of dried product() (NEE with 0.3889 0.6189 -0.280T0 Cal2o4•H2O 0.998 g...
Organic Chemistry: Acetylation & Bromination Write-Up Sheet for Synthesis of Bromoacetanilides Experiment DATA & ANALYSIS Weights:...
Organic Chemistry: Acetylation & Bromination
Write-Up Sheet for Synthesis of Bromoacetanilides Experiment DATA & ANALYSIS Weights: Day 1 aniline_1.019 crude acetanilide obtained acetic anhydride 1. 0.8ta Weights: Day 2 acetanilide used for bromination 0:59 recrystallized bromoacetanilide 0.369 Melting Points: 139.0°C - Observed melting point of recrystallized bromoacetanilide 1910 Literature Melting points Literature Melting Point References acetanilide 113-115°C chemical book.com o-bromoacetanilide 96.5-100.5°C Chemical book.com p-bromoacetanilide 165-169°C chemical book.com QUESTIONS – DAY 1 1) What is the percent yield for your acetylation...
The goal of this experiment is to separate a mixture of two unknown compounds into individual...
The goal of this experiment is to separate a mixture of two unknown compounds into individual Components and to identify the compounds. Answer the questions below. More than one answer may be possible. Why do we need to be especially careful when working with diethyl ether? Fumes can cause drowsiness & dizziness, and in high concentration, loss of consciousness Because it is highly acidic and can burn the skin Because it is extremely volatile and flammable. Of all of the...
when will temerature changes occur in the first part of the experiment? EXPERIMENT 4: POSTLAB EXERCISE Name Assu...
when will temerature changes occur in the first part of the
experiment?
EXPERIMENT 4: POSTLAB EXERCISE Name Assume vou have a mixture of two types of plastic and need to separate them You know that plastic A and B are both white in color, plastic A will dissolve in toluene and plastic B will not; plastic A has a density of 0.57 g/cm' and plastic B has a density of 1.08 g/em Oh, by the way, your boss, wants all...
Experiment 2 Report Sheet Identification of a Compound: Chemical Properties Date Desk No _Lab Sec. Name...
Experiment 2 Report Sheet Identification of a Compound: Chemical Properties Date Desk No _Lab Sec. Name A. Chemical Properties of Known Compounds Indicate your observations in the reaction matrix Test NaClag) Na,C0/91 MgSO4aq) NH Chiag) on H,00 Unknown on reaksi senior Ne prends Nie mody ONaOH(aq) NIR WIR cloudy NIR WIR NIR HCl(aq) NIR NR NIE NR NR NR Write formulas for the precipitates that formed in Part A. (See Appendix E) Pan A. AgCl Agon AgCl- Part A 2...
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...
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...
Question 2,3,4 please.
ESTIONS: 1. Many students do not recover 100% of the original mixture. Describe at least two possible problems that could cause less than 100% recovery of the mixture. 2. A student received a mixture that actually contained 50.0% salt and 50.0% sand. At the end of the experiment, this student calculated that his sample was composed of 45.2% salt and 54.8% sand. What might he have done (or not done correctly) during the experiment to cause this...
i need help with data Analysis
Experiment & Report Sheet Limiting Reactant Desk No. to Lab Sec. - Lab Sec. Name Precipitation of CaC,OH,O from the Salt Mixture Unknown number_ 2 I Mass of beaker() Mass of beaker and salt mixture (8) Trial Trial 2 3. Mass of salt mixture (8) 4. Mass of filter paper() 5. Mass of filter paper and product after air-dried roven-dried (e) 6. Mass of dried product() (NEE with 0.3889 0.6189 -0.280T0 Cal2o4•H2O 0.998 g...
Organic Chemistry: Acetylation & Bromination
Write-Up Sheet for Synthesis of Bromoacetanilides Experiment DATA & ANALYSIS Weights: Day 1 aniline_1.019 crude acetanilide obtained acetic anhydride 1. 0.8ta Weights: Day 2 acetanilide used for bromination 0:59 recrystallized bromoacetanilide 0.369 Melting Points: 139.0°C - Observed melting point of recrystallized bromoacetanilide 1910 Literature Melting points Literature Melting Point References acetanilide 113-115°C chemical book.com o-bromoacetanilide 96.5-100.5°C Chemical book.com p-bromoacetanilide 165-169°C chemical book.com QUESTIONS – DAY 1 1) What is the percent yield for your acetylation...
The goal of this experiment is to separate a mixture of two unknown compounds into individual Components and to identify the compounds. Answer the questions below. More than one answer may be possible. Why do we need to be especially careful when working with diethyl ether? Fumes can cause drowsiness & dizziness, and in high concentration, loss of consciousness Because it is highly acidic and can burn the skin Because it is extremely volatile and flammable. Of all of the...
when will temerature changes occur in the first part of the
experiment?
EXPERIMENT 4: POSTLAB EXERCISE Name Assume vou have a mixture of two types of plastic and need to separate them You know that plastic A and B are both white in color, plastic A will dissolve in toluene and plastic B will not; plastic A has a density of 0.57 g/cm' and plastic B has a density of 1.08 g/em Oh, by the way, your boss, wants all...
Experiment 2 Report Sheet Identification of a Compound: Chemical Properties Date Desk No _Lab Sec. Name A. Chemical Properties of Known Compounds Indicate your observations in the reaction matrix Test NaClag) Na,C0/91 MgSO4aq) NH Chiag) on H,00 Unknown on reaksi senior Ne prends Nie mody ONaOH(aq) NIR WIR cloudy NIR WIR NIR HCl(aq) NIR NR NIE NR NR NR Write formulas for the precipitates that formed in Part A. (See Appendix E) Pan A. AgCl Agon AgCl- Part A 2...
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