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We have already looked into the science behind heavey metals and disintegration as well as light atoms and their union. This assignment requires you to establish the differences between the two as well as their different applications. Which hazards are associated with each of them. Be objective and to the point. Use any references you have but remember to quote. Any plagiarism detected calls for a Zero. 2 pages minimum work.
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Lab Assignment 6
Collisions and momentum are something we experience every day. Most of the collisions in our life are benign - bumping int ...
Lab Assignment 6
Collisions and momentum are something we experience every day. Most of the collisions in our life are benign - bumping into a colleague in the hall, ...
SU The Usage & Consumption of Caffeine in The Contemporary World Discussion
http://www.huffingtonpost.com/2015/02/20/varying-effects-of-caffeine_n_6671788.html 1.During this last week's lecture ...
SU The Usage & Consumption of Caffeine in The Contemporary World Discussion
http://www.huffingtonpost.com/2015/02/20/varying-effects-of-caffeine_n_6671788.html 1.During this last week's lecture, we discussed how coffee keeps us awake by competing with adenosine for the adenosine receptor. Read the article and watch the videos above. The article discusses other reasons why individuals respond differently to caffeine, all of which involve biochemistry. Discuss your thoughts about this article, including your personal experiences with caffeine. Were you surprised by any of the factors discussed in this article? Do you disagree with any of these factors? Which of these factors do you believe explains your response to caffeine? Are there any other common food-related chemicals that we commonly consume that act as a competitive inhibitor of a normal biological process in our body?You should contribute one (1) comment (at least 300 words) to this week's discussion. In your post, you should provide a detailed explanation to support your views (include references, if needed). You may use the questions I asked above or discuss another aspect of the article and videos that caught your attention. Please DO NOT copy any of your classmate’s comments or plagiarize (you will not receive credit for doing this). REPLY CLASSMATE 1:Juliana Sarpong: Many of us rely on a morning cup of coffee or a jolt of caffeine in the afternoon to help us get through the day. Caffeine is so widely available that the U.S. Food and Drug Administration (FDA), says about 80 percent of U.S. adults take some form of caffeine every day. But caffeine does so much more than just keeping you awake. It is a central nervous system stimulant that affects your body in numerous ways. I found this week article and the videos remarkably interesting. My husband lives and breath coffee every morning. My husband started consuming coffee when he started working early morning like every other American. His first stop used to be either wawa or Starbucks. He started to realize that coffee was getting expensive, so he decided to buy his own Keurig machine and make his own coffee every morning. He drinks any amount of coffee, drink soda thinking it will help boost his energy. I guess all the years of drinking caffeine built an immunity in his body, so his system does not respond to it anymore.This article has given me an understanding on how caffeine drinkers differ from person to person. I for one use to think that caffeine is the only way for early morning risers like my husband stay awake on their way to work, not knowing it does the opposite. And after reading the article I now know all the positive effect caffeine has on people like fight liver disease and helping with Parkinson’s disease. Before reading this article I only knew of the withdrawal some people go through after a caffeine intake, but this article gave me an insight about the positivity on caffeine. REPLY CLASSMATE 2:Akosua Brefo: In this lesson we discussed about caffeine and its effect on the human brain. I heard about drinking coffee to keep awake when I have preparing to take my final examination in secondary school (1999). I decided to take a cup of coffee to stay alert and study during the night. I added creamer, sugar two slices of bread. I slept just few minutes after drinking it. I discussed this with my mate and was told not to add neither sugar nor cream. Also, not to have anything with it. I managed to have it black with no added sugar or cream the next time. It tasted bitter but since I wanted to stay awake, I drank it. I slept just as the same as I added sugar and cream.Probably my genetics are to blame! For not keeping awake after drinking black coffee with no sugar. Caffeine interacts most directly with the A1 receptor. Caffeine causes most of its biological effects via antagonizing all types of adenosine receptors (ARs): A1, A2A, A3, and A2B and, as does adenosine, exerts effects on neurons and glial cells of all brain areas.This lesson has given me more insight about how people react to caffeine differently. I had a misconception that caffeine consumption. I did know caffeine had any health benefits apart from keeping people awake. I now know that moderate coffee consumption can help with liver disease, providing boast of antioxidants and protecting the brain against Parkinson’s disease.I had more insight about the bad effects of caffeine.According to the article, people get caffeine from consumption of coffee, tea, soda or chocolateI avoid coffee even though I like the smell because it’s side effect of getting addicted and all negatives said at it. Actually, I am getting caffeine from consumption of chocolate. Lesson 3Answer the following questions related to the case study (Sweet Truth: Not all Carbohydrates are Alike):1. In aqueous solutions, there are three forms of glucose: the cyclic alpha-form (36%), the cyclic beta-form (64%), and a trace amount of the open-chain form. At equilibrium, the cyclic alpha- and beta-forms are constantly interchanging when in solution. (1) Explain why the cyclic forms exist predominately in solutions, AND (2) explain why the cyclic beta-form is more abundant than the cyclic alpha-form. 2. Name the monosaccharides and disaccharides in amylose and cellulose. Compare the structural and conformation differences between amylose and cellulose. A simple iodine test can be used to distinguish the two polysaccharides. (1) Describe the iodine test AND (2) explain the observation.3. List AND explain the side effects that can be caused consuming too much sorbitol.4. Why are soluble fibers identified as prebiotics?
Prince Mohammad Using Calibration Curves to Determine Concentration Chemistry Lab
this week we have two lab all due in the same time, i will be attaching the labs and as always there are some related quie ...
Prince Mohammad Using Calibration Curves to Determine Concentration Chemistry Lab
this week we have two lab all due in the same time, i will be attaching the labs and as always there are some related quiestion with them.
8 pages
Regeneration Lab Report
Regeneration explains how some organisms, plants, and animals replace or restore some of their lost body parts. Regenerati ...
Regeneration Lab Report
Regeneration explains how some organisms, plants, and animals replace or restore some of their lost body parts. Regeneration is made possible by ...
Dynamics Lab WITH lab report
Use the simulation/data page 9 times (get your data (Links to an external site.)) for every combination of hanging mass, a ...
Dynamics Lab WITH lab report
Use the simulation/data page 9 times (get your data (Links to an external site.)) for every combination of hanging mass, and cart mass. Download each of the 9 data textfiles. Click on the "Get Mass Info" button once (not 9 times) and record the masses given (it won't change).Go tohttps://www.vernier.com/downloads/logger-pro-demo/ (Links to an external site.)and download logger pro for PC or Mac. Install the program.Run the Logger Pro application. Under the FILE menu, go to the "Import From..." menu item. Choose "Text File..."Then either go to the Analyze menu and selected Curve Fit, or find the Curve Fit button (looks like a U on top of an M).On the curve fit page, choose "Quadratic" and click on "Try Fit", then press OK. Record the value of A ± σA and repeat for the 9 combinations of hanging mass and cart mass.Video Lecture: Watch It NOW!!!DATA ENTRY WEBSITE: https://stemplosion.com/2019_labs.asp?c=0321
Acid Base Titration Lab Report
A titration is a common laboratory method used in analytical chemistry to determine the concentration of certain acids or ...
Acid Base Titration Lab Report
A titration is a common laboratory method used in analytical chemistry to determine the concentration of certain acids or bases during the production of certain biofuels, pharmaceutical drugs, and many other commercial products. In this assignment, you will perform an acid-base titration of an unknown acid.
Instructions
Your task is to conduct an acid-base titration. In this experiment, you will use the simulation from ChemCollective to determine the molar concentration of a weak monoprotic acid using a strong base of known volume and concentration.
Select the link to open the Unknown Acid and Base simulation in another browser window.
Unknown Acid and Base Problem (chemcollective.org)
Select the File in the upper left corner to open the assignment. Choose Load an Assignment from the drop down list.
In the Assignment list, select Acids and Bases. Scroll down to the Unknown Acid and Base Problem, and select the arrow to the right of the title. This will take you to the lab.
Step 1: Setting Up The Work Bench
Open the simulation on your browser and navigate to the Unknown Acid and Base Problem. The following steps are required to set-up the lab work bench.
In the Stockroom there are three tabs: Solutions, Glassware, and Tools. Select the Solutions tab. In the list of solutions, select the Unknown Acid 0.1 L. This will place 100.00 mL of the unknown acid in an Erlenmeyer flask on the lab workbench. Return to the Stockroom.
In the Solutions list, select Indicators. Choose the Phenolphthalein Indicator Solution from the list. The indicator will turn pink when you have passed the end point.
Select and hold the bottle of Phenolphthalein and move it over the top of the flask containing the unknown acid. A measurement box will appear. Add 5.00 mL of indicator solution to the flask containing the unknown acid. Right click on the indicator bottle, and choose Remove to take it from the workbench. Return to the Stockroom.
In the Solutions list, choose a Strong Base from the list of solutions. Make note of the type of base, the volume, and the molar concentration. Return to the Stockroom.
In the Glassware list, select Other. from the drop down list, choose the 50.00 mL burette. This will place it on the lab work bench.
Select and hold the flask containing the base, and move it over the top of the burette. A measurement box will appear. Add 50.00 mL of the base to the burette. Record the initial burette reading.
Step 2: Conducting Your Experiment
Select and hold the burette containing the base, and move it over the top of the flask containing the unknown acid. A measurement box will appear. Begin by adding the base to the unknown acid at 5.00 mL increments (watch the pH readings in the panel at the left). Record each increment of base added to the unknown acid, along with the corresponding pH.
As you approach the colour change, reduce the amount of base to 1.00 mL increments, then 0.50 mL increments. Note: you can use even smaller increments to get more precise results.
Once you have identified the endpoint, repeat the procedure but go past the endpoint. Continue adding base at your selected increment until the pH is approximately 11.
Step 3: Graphing and Analyzing Your Results
Use your data to calculate the concentration (i.e. molar concentration) of the unknown acid.
Graph your titration curve. Place the volume of base on the x-axis and the pH of the unknown acid solution on the y-axis.
Find the equivalence point on your graph, and use the volume at this point to calculate the concentration of the unknown acid.
When the colour of the solution changes to pink, you have passed the endpoint. However, this gives you a good idea where the endpoint is: it is the volume just before the solution changes colour.
In your discussion, comment on the two ways of calculating the acid concentration. Also include a description of how the number of moles of base affected the pH of the unknown solution.
Step 4: Communicating Your Results
Once you have completed your test(s), communicate your results in a lab report.
Your lab report should include the following sections: purpose/objective, materials, procedure, observations, results, discussion, and conclusion. Note: there is no testable question/hypothesis for this experiment. In its place, simply report the purpose or objective of the experiment.
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Lab Assignment 6
Collisions and momentum are something we experience every day. Most of the collisions in our life are benign - bumping int ...
Lab Assignment 6
Collisions and momentum are something we experience every day. Most of the collisions in our life are benign - bumping into a colleague in the hall, ...
SU The Usage & Consumption of Caffeine in The Contemporary World Discussion
http://www.huffingtonpost.com/2015/02/20/varying-effects-of-caffeine_n_6671788.html 1.During this last week's lecture ...
SU The Usage & Consumption of Caffeine in The Contemporary World Discussion
http://www.huffingtonpost.com/2015/02/20/varying-effects-of-caffeine_n_6671788.html 1.During this last week's lecture, we discussed how coffee keeps us awake by competing with adenosine for the adenosine receptor. Read the article and watch the videos above. The article discusses other reasons why individuals respond differently to caffeine, all of which involve biochemistry. Discuss your thoughts about this article, including your personal experiences with caffeine. Were you surprised by any of the factors discussed in this article? Do you disagree with any of these factors? Which of these factors do you believe explains your response to caffeine? Are there any other common food-related chemicals that we commonly consume that act as a competitive inhibitor of a normal biological process in our body?You should contribute one (1) comment (at least 300 words) to this week's discussion. In your post, you should provide a detailed explanation to support your views (include references, if needed). You may use the questions I asked above or discuss another aspect of the article and videos that caught your attention. Please DO NOT copy any of your classmate’s comments or plagiarize (you will not receive credit for doing this). REPLY CLASSMATE 1:Juliana Sarpong: Many of us rely on a morning cup of coffee or a jolt of caffeine in the afternoon to help us get through the day. Caffeine is so widely available that the U.S. Food and Drug Administration (FDA), says about 80 percent of U.S. adults take some form of caffeine every day. But caffeine does so much more than just keeping you awake. It is a central nervous system stimulant that affects your body in numerous ways. I found this week article and the videos remarkably interesting. My husband lives and breath coffee every morning. My husband started consuming coffee when he started working early morning like every other American. His first stop used to be either wawa or Starbucks. He started to realize that coffee was getting expensive, so he decided to buy his own Keurig machine and make his own coffee every morning. He drinks any amount of coffee, drink soda thinking it will help boost his energy. I guess all the years of drinking caffeine built an immunity in his body, so his system does not respond to it anymore.This article has given me an understanding on how caffeine drinkers differ from person to person. I for one use to think that caffeine is the only way for early morning risers like my husband stay awake on their way to work, not knowing it does the opposite. And after reading the article I now know all the positive effect caffeine has on people like fight liver disease and helping with Parkinson’s disease. Before reading this article I only knew of the withdrawal some people go through after a caffeine intake, but this article gave me an insight about the positivity on caffeine. REPLY CLASSMATE 2:Akosua Brefo: In this lesson we discussed about caffeine and its effect on the human brain. I heard about drinking coffee to keep awake when I have preparing to take my final examination in secondary school (1999). I decided to take a cup of coffee to stay alert and study during the night. I added creamer, sugar two slices of bread. I slept just few minutes after drinking it. I discussed this with my mate and was told not to add neither sugar nor cream. Also, not to have anything with it. I managed to have it black with no added sugar or cream the next time. It tasted bitter but since I wanted to stay awake, I drank it. I slept just as the same as I added sugar and cream.Probably my genetics are to blame! For not keeping awake after drinking black coffee with no sugar. Caffeine interacts most directly with the A1 receptor. Caffeine causes most of its biological effects via antagonizing all types of adenosine receptors (ARs): A1, A2A, A3, and A2B and, as does adenosine, exerts effects on neurons and glial cells of all brain areas.This lesson has given me more insight about how people react to caffeine differently. I had a misconception that caffeine consumption. I did know caffeine had any health benefits apart from keeping people awake. I now know that moderate coffee consumption can help with liver disease, providing boast of antioxidants and protecting the brain against Parkinson’s disease.I had more insight about the bad effects of caffeine.According to the article, people get caffeine from consumption of coffee, tea, soda or chocolateI avoid coffee even though I like the smell because it’s side effect of getting addicted and all negatives said at it. Actually, I am getting caffeine from consumption of chocolate. Lesson 3Answer the following questions related to the case study (Sweet Truth: Not all Carbohydrates are Alike):1. In aqueous solutions, there are three forms of glucose: the cyclic alpha-form (36%), the cyclic beta-form (64%), and a trace amount of the open-chain form. At equilibrium, the cyclic alpha- and beta-forms are constantly interchanging when in solution. (1) Explain why the cyclic forms exist predominately in solutions, AND (2) explain why the cyclic beta-form is more abundant than the cyclic alpha-form. 2. Name the monosaccharides and disaccharides in amylose and cellulose. Compare the structural and conformation differences between amylose and cellulose. A simple iodine test can be used to distinguish the two polysaccharides. (1) Describe the iodine test AND (2) explain the observation.3. List AND explain the side effects that can be caused consuming too much sorbitol.4. Why are soluble fibers identified as prebiotics?
Prince Mohammad Using Calibration Curves to Determine Concentration Chemistry Lab
this week we have two lab all due in the same time, i will be attaching the labs and as always there are some related quie ...
Prince Mohammad Using Calibration Curves to Determine Concentration Chemistry Lab
this week we have two lab all due in the same time, i will be attaching the labs and as always there are some related quiestion with them.
8 pages
Regeneration Lab Report
Regeneration explains how some organisms, plants, and animals replace or restore some of their lost body parts. Regenerati ...
Regeneration Lab Report
Regeneration explains how some organisms, plants, and animals replace or restore some of their lost body parts. Regeneration is made possible by ...
Dynamics Lab WITH lab report
Use the simulation/data page 9 times (get your data (Links to an external site.)) for every combination of hanging mass, a ...
Dynamics Lab WITH lab report
Use the simulation/data page 9 times (get your data (Links to an external site.)) for every combination of hanging mass, and cart mass. Download each of the 9 data textfiles. Click on the "Get Mass Info" button once (not 9 times) and record the masses given (it won't change).Go tohttps://www.vernier.com/downloads/logger-pro-demo/ (Links to an external site.)and download logger pro for PC or Mac. Install the program.Run the Logger Pro application. Under the FILE menu, go to the "Import From..." menu item. Choose "Text File..."Then either go to the Analyze menu and selected Curve Fit, or find the Curve Fit button (looks like a U on top of an M).On the curve fit page, choose "Quadratic" and click on "Try Fit", then press OK. Record the value of A ± σA and repeat for the 9 combinations of hanging mass and cart mass.Video Lecture: Watch It NOW!!!DATA ENTRY WEBSITE: https://stemplosion.com/2019_labs.asp?c=0321
Acid Base Titration Lab Report
A titration is a common laboratory method used in analytical chemistry to determine the concentration of certain acids or ...
Acid Base Titration Lab Report
A titration is a common laboratory method used in analytical chemistry to determine the concentration of certain acids or bases during the production of certain biofuels, pharmaceutical drugs, and many other commercial products. In this assignment, you will perform an acid-base titration of an unknown acid.
Instructions
Your task is to conduct an acid-base titration. In this experiment, you will use the simulation from ChemCollective to determine the molar concentration of a weak monoprotic acid using a strong base of known volume and concentration.
Select the link to open the Unknown Acid and Base simulation in another browser window.
Unknown Acid and Base Problem (chemcollective.org)
Select the File in the upper left corner to open the assignment. Choose Load an Assignment from the drop down list.
In the Assignment list, select Acids and Bases. Scroll down to the Unknown Acid and Base Problem, and select the arrow to the right of the title. This will take you to the lab.
Step 1: Setting Up The Work Bench
Open the simulation on your browser and navigate to the Unknown Acid and Base Problem. The following steps are required to set-up the lab work bench.
In the Stockroom there are three tabs: Solutions, Glassware, and Tools. Select the Solutions tab. In the list of solutions, select the Unknown Acid 0.1 L. This will place 100.00 mL of the unknown acid in an Erlenmeyer flask on the lab workbench. Return to the Stockroom.
In the Solutions list, select Indicators. Choose the Phenolphthalein Indicator Solution from the list. The indicator will turn pink when you have passed the end point.
Select and hold the bottle of Phenolphthalein and move it over the top of the flask containing the unknown acid. A measurement box will appear. Add 5.00 mL of indicator solution to the flask containing the unknown acid. Right click on the indicator bottle, and choose Remove to take it from the workbench. Return to the Stockroom.
In the Solutions list, choose a Strong Base from the list of solutions. Make note of the type of base, the volume, and the molar concentration. Return to the Stockroom.
In the Glassware list, select Other. from the drop down list, choose the 50.00 mL burette. This will place it on the lab work bench.
Select and hold the flask containing the base, and move it over the top of the burette. A measurement box will appear. Add 50.00 mL of the base to the burette. Record the initial burette reading.
Step 2: Conducting Your Experiment
Select and hold the burette containing the base, and move it over the top of the flask containing the unknown acid. A measurement box will appear. Begin by adding the base to the unknown acid at 5.00 mL increments (watch the pH readings in the panel at the left). Record each increment of base added to the unknown acid, along with the corresponding pH.
As you approach the colour change, reduce the amount of base to 1.00 mL increments, then 0.50 mL increments. Note: you can use even smaller increments to get more precise results.
Once you have identified the endpoint, repeat the procedure but go past the endpoint. Continue adding base at your selected increment until the pH is approximately 11.
Step 3: Graphing and Analyzing Your Results
Use your data to calculate the concentration (i.e. molar concentration) of the unknown acid.
Graph your titration curve. Place the volume of base on the x-axis and the pH of the unknown acid solution on the y-axis.
Find the equivalence point on your graph, and use the volume at this point to calculate the concentration of the unknown acid.
When the colour of the solution changes to pink, you have passed the endpoint. However, this gives you a good idea where the endpoint is: it is the volume just before the solution changes colour.
In your discussion, comment on the two ways of calculating the acid concentration. Also include a description of how the number of moles of base affected the pH of the unknown solution.
Step 4: Communicating Your Results
Once you have completed your test(s), communicate your results in a lab report.
Your lab report should include the following sections: purpose/objective, materials, procedure, observations, results, discussion, and conclusion. Note: there is no testable question/hypothesis for this experiment. In its place, simply report the purpose or objective of the experiment.
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