Upload your picture of your three before analyte preparation beakers with their contents. To receive credit, the beakers and their contents must be clearly visible in the picture, as well as clearly labeled with your name, the lab title (with “before analyte preparation” indicated), and the date in clear view.

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DISCUSSION QUESTION

Question 1 (16 points)
Upload your picture of your three before analyte preparation beakers with their contents.

To receive credit, the beakers and their contents must be clearly visible in the picture, as well as clearly labeled with your name, the lab title (with “before analyte preparation” indicated), and the date in clear view.

 

Question 2 (16 points)
Upload your picture of your prepared analyte experimental setup.

To receive credit, your beaker, your solvent (mobile phase), and your filter paper (stationary phase) with spots (analyte) and initial pencil-marked spotting line should all be clearly visible, and also include in your picture a label with your name, the lab title (with “prepared analyte” indicated), and the date in clear view.

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Question 3 (20 points)
Upload your picture of your 4 chromatograms.

To receive credit, all solvent names, Rf values, and color labels should all be clearly visible. Also include in your picture a label with your name, the lab title (with “analyte results” indicated), and the date in clear view. This must be a single picture.

 

Question 4 (20 points)
Upload your completed Table 1: Paper Chromatography Data and Observations and Rf Calculations.

 

How would you balance this chemical equation? NaCl + Ca(OH)2 + Al2(SO4)3 + H2O → Ca2Al(OH)6(Cl,OH)· 2H2O + Ca6Al2(SO4)3(OH)12 + NaOH

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Balance a complex chemical formula

How would you balance this chemical equation?

NaCl + Ca(OH)2 + Al2(SO4)3 + H2O → Ca2Al(OH)6(Cl,OH)· 2H2O + Ca6Al2(SO4)3(OH)12 + NaOH

 

 

The peasants in the past wouldn’t have thought of them as “observations”, but what did the peasants notice that lead them to develop the technology?

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Analyze Myth Assignment

In this assignment you are to think about the observations and experiments that went into developing an ancient technology.  You can do anything you wish, but the technology must have been in use at least 500yrs.

If you wish you can use the following:

https://www.youtube.com/watch?v=IxBsbzUKnAs

Questions:

  1. What is the technology?   If you are using the above video, what was developed was a rush light.
  2. The peasants in the past wouldn’t have thought of them as “observations”, but what did the peasants notice that lead them to develop the technology?
    1. If you are using the above video,
      1. why do they soak the rushes in fat?
      2. Why do they use that particular grass?
  1. What various things might have been tried in the development of the old technology? If you were doing this for a more modern invention, Edison tried many different filaments before he found tungsten filaments for his light bulbs.  These variations they tried were essentially experiments.
    1. If you are using the above video,
      1. What would happen if you just burned grass without soaking it in fat?
      2. Why is fat a good idea for soaking the grass? Why not salt water and then let the grasses dry?
  • How would the light perform with other grass?
  1. Soaking didn’t change the performance of the rush light. Why might the peasants have thought soaking the grass might help?
  2. What types of fat might they have tried?
  3. Could they try soaking the grass in anything else that would be available?

List out all materials and chemicals required (includes glassware, chemicals, and instrumentation used). Provide the safety information for each chemical used in the experiment.

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Determination of Caffeine Content in caffeinated beverages using HPLC

Introduction (8):

Minimum word limit: 300 words
Introduction should focus on theory and background for the experiment you are performing. This includes any important chemical reactions or calculations that are key to the experiment. Inclusion of reactions and calculations must be discussed and not simply placed in this section. Lastly, include an industry/research related adaptation (application) of the main technique (e.g. Iodometry, gravimetric, etc…) used in the experiment. This should provide a summary of the work being done and how it relates to the experiment and should also include in-text citations (at least three citations not including lab manual and any safety information related links).

Materials (2):

List out all materials and chemicals required (includes glassware, chemicals, and instrumentation used).

Safety (4):

Provide the safety information for each chemical used in the experiment. This includes even nonhazardous chemicals such as water. Please note that not all chemicals will be listed in the materials section provided in the lab manual so you must read through the procedure to provide all chemical safety. Each chemical should have the following information provided: Hazards Identification (section 3 of SDS) Handling (section 7 of SDS) Personal Protection (section 8 of SDS)

Procedure (4):

Do not copy the procedure from the lab manual. Come up with your own plan, which should briefly but comprehensively cover all the procedure you will perform. You can format this section in either paragraph, bullet point, or flow chart format. Include mock calculations used (formulae..)

References (2):

In text citations must be provided and ACS formatted citations must be used when creating the citation.

Write a research paper basically on how Nanoparticles , specifically shark skin, are used to extend shelf life – specifically strawberries.

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Research Paper

Write a research paper basically on how Nanoparticles , specifically shark skin, are used to extend shelf life – specifically strawberries.

Using your results for Experiment 3: Measuring the Enthalpy of Fusion of Water, calculate the molar heat of fusion of ice, i.e., the number of kilojoules of heat per mole ice.

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Lab 7:9

Question 1 (8 points)
Upload your picture of your metal sample being massed.

To receive credit, your metal and the mass readout must be clearly visible in the picture, as well as a clear label with your name, the lab title (with Experiment number), and the date in clear view. This must be a single picture.

Question 1 options:

Question 2 (8 points)
Upload your picture of you heating your metal strips.

To receive credit, you must be clearly visible holding the metal strips in the picture, and it must include a clear label with your name, the lab title (with Experiment number), and the date in clear view. This must be a single picture.

Question 2 options:

Question 3 (8 points)
Upload your picture of your assembled calorimeter with final temperature reading.

To receive credit, your full calorimeter and temperature reading must be clearly visible in the picture, as well as a clear label with your name, the lab title (with Experiment number), and the date in clear view. This must be a single picture.

Question 3 options:

Question 4 (20 points)
Upload your picture of your Table 2: Specific Heat Data from Experiment 1: Determination of Specific Heat of a Metal.

Question 4 options:

Question 5 (8 points)
Upload your picture of your spoonful of ammonium nitrate being transferred to your calorimeter.

To receive credit, your calorimeter and the ammonium nitrate must be clearly visible in the picture, as well as a clear label with your name, the lab title (with Experiment number), and the date in clear view. This must be a single picture.

Question 5 options:

Question 6 (8 points)
Upload your picture of your Table 4: Cold Pack Data and Table 5: Hand Warmer Data from Experiment 2: Cold Packs vs. Hand Warmers.

Question 6 options:

Question 7 (8 points)
In Experiment 2: Cold Packs vs. Hand Warmers, according to your experimental results:

1) Calculate the overall temperature change for the cold pack, ΔT = Tmax – Tmin

2) Explain why this reaction is considered endothermic.

Show all work and be detailed in your response in order to receive credit.

Question 7 options:

Question 8 (8 points)
Upload your picture of your Table 5: Enthalpy Data from Experiment 3: Measuring the Enthalpy of Fusion of Water.

Question 8 options:

Question 9 (8 points)
Calculate the heat lost by the hot water using your results for Experiment 3: Measuring the Enthalpy of Fusion of Water. Heat must be expressed in kilojoules (kJ).

Q= (4.18 J/g °C) x (1 kJ/1000 J) x mass of water (g) x ΔT

Question 9 options:

Question 10 (8 points)
Using your results for Experiment 3: Measuring the Enthalpy of Fusion of Water, calculate the molar heat of fusion of ice, i.e., the number of kilojoules of heat per mole ice.

q = ΔHfusm

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Question 11 (4 points)
Using your results for Experiment 3: Measuring the Enthalpy of Fusion of Water, calculate the percent error in your determination of the value for the molar heat of fusion of ice.

Percent Error = |Experimental – Actual|/ (Actual) x 100 = % Error

Question 11 options:

Question 12 (4 points)
Answer the following Post-Lab Questions on potential sources of error in this experiment.

1) What could have or did go wrong?

2) How might this have impacted your data?

3) How could you address/fix such errors in future experiments?

What could have or did go wrong? How might this have impacted your data? How could you address/fix such errors in future experiments?

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4:11 lab

Question 1 (16 points)

Upload your picture of your precipitate before filtration.

To receive credit, the beaker and its contents must be clearly visible in the picture, as well as clearly labeled with your name, the lab title, the name of the compound, and the date.

Question 1 options:

Question 2 (16 points)
Please upload your picture of your sample being filtered.

To receive credit, your sample and your setup must be clearly visible in the picture, and your sample labeled with your name, the lab title, the name of the compound, and the date.

Question 2 options:

Question 3 (16 points)
Upload your picture of your dried precipitate being massed on the scale.

To receive credit, your sample and its mass readout must be clearly visible in the picture, as well as clearly labeled with your name, the lab title, the name of the compound, and the date.

Question 3 options:

Question 4 (16 points)
Upload your picture of your before and after 24 hr samples of CaCl2 (with the “after” being massed on the scale).

To receive credit, your “before” sample and your “after” sample and its mass readout must be clearly visible in the picture, as well as each clearly labeled with your name, the lab title, the name of the compound, and the date.

Question 4 options:

Question 5 (24 points)
Upload your completed Table 1: Data and Observations, Table 2: 24 Hour CaCl2, calculations, and Post-Lab Question answers.

Question 5 options:

Question 6 (12 points)
Answer the following Post-Lab Questions on potential sources of error in this experiment.

1) What could have or did go wrong?

2) How might this have impacted your data?

3) How could you address/fix such errors in future experiments?

Which resulted in more accurate and more precise results—your three shots or the three shots from different individuals? Explain why you would or would not have expected this result.

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Lab 0-0

Question 1 (16 points)
Upload a picture of your accuracy results per Step 4 of the lab procedure. This must be a single picture.

Question 1 options:

Question 2 (16 points)
Upload a picture of your precision results per Step 6 of the lab procedure. This must be a single picture.

Question 2 options:

Question 3 (16 points)
Upload your picture of your bottled water being weighed per Step 10 of the lab procedure. This must be a single picture.

Question 3 options:

Question 4 (16 points)
Upload your Table 1 per Step 14 of the lab procedure.

Question 4 options:

Question 5 (16 points)
Upload your Table 2 per Step 14 of the lab procedure.

Question 5 options:

Question 6 (8 points)
You have been chosen from the crowd to be the assistant to a knife-throwing demonstration. The thrower has asked you to stand very still with an apple sitting on top of your head, and he is going to throw a knife into the apple, removing it from your head. For whatever insane reason, you have agreed. Would you rather the thrower be accurate, or precise? Explain why.

Question 6 options:

Question 7 (8 points)
Which resulted in more accurate and more precise results—your three shots or the three shots from different individuals? Explain why you would or would not have expected this result.
Question 7 options:

Question 8 (4 points)
List and discuss two potential sources of error in this experiment

Upload your picture of your three before analyte preparation beakers with their contents. To receive credit, the beakers and their contents must be clearly visible in the picture, as well as clearly labeled with your name(Brooke bedell), the lab title (with “before analyte preparation” indicated), and the date in clear view.

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Lab work

Question 1 (16 points)
Upload your picture of your three before analyte preparation beakers with their contents.

To receive credit, the beakers and their contents must be clearly visible in the picture, as well as clearly labeled with your name(Brooke bedell), the lab title (with “before analyte preparation” indicated), and the date in clear view.

Question 2 (16 points)
Please upload your picture of your prepared analyte experimental setup.

To receive credit, your beaker, your solvent (mobile phase), and your filter paper (stationary phase) with spots (analyte) and initial pencil-marked spotting line should all be clearly visible, and also include in your picture a label with your name, the lab title (with “prepared analyte” indicated), and the date in clear view.

Question 3 (20 points)
Upload your picture of your 4 chromatograms.

To receive credit, all solvent names, Rf values, and color labels should all be clearly visible. Also include in your picture a label with your name, the lab title (with “analyte results” indicated), and the date in clear view. This must be a single picture.

Question 4 (20 points)
Upload your completed Table 1: Paper Chromatography Data and Observations and Rf Calculations.

How does the molecular motion of the air particles explain your results in Experiment 2: Charles’ Law, Part 1?

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Ex 6 lab 8

Question 1 (10 points)
Upload your picture of your Gas Collection Apparatus.

To receive credit, your ring stand, graduated cylinder, beaker, all tubing, flask, etc. The oxygen bubbles must be clearly visible in the picture, as well as clear label with your name, the lab title (with Experiment number), and the date in clear view. This must be a single picture.

Question 1 options:

Question 2 (8 points)
Upload your picture of your completed Table 1: Temperature, Pressure, and Volume Data and Table 2: Reaction Time Data.

Question 2 options:

Question 3 (8 points)
The goal for Experiment 1: Ideal Gas Law – Finding Percent H2O2 with Yeast is to find the percentage of hydrogen peroxide in the solution. To determine percentage, you need to first determine how many moles of hydrogen peroxide are present. Rearrange PV=nRT to solve for n, then plug in your known values for P, V, R, and T.

Show all your calculations from Experiment 1 for converting your temperature (T) to Kelvin.

Question 3 options:

Question 4 (8 points)
The goal for Experiment 1: Ideal Gas Law – Finding Percent H2O2 with Yeast is to find the percentage of hydrogen peroxide in the solution. To determine percentage, you need to first determine how many moles of hydrogen peroxide are present. Rearrange PV=nRT to solve for n, then plug in your known values for P, V, R, and T.

Show your calculations from Experiment 1 for converting your pressure (P) to atm. (If you obtained the pressure originally in atm without converting, then convert atm to mmHg to demonstrate you know how to do this conversion.)

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Question 5 (8 points)
The goal for Experiment 1: Ideal Gas Law – Finding Percent H2O2 with Yeast is to find the percentage of hydrogen peroxide in the solution. To determine percentage, you need to first determine how many moles of hydrogen peroxide are present. Rearrange PV=nRT to solve for n, then plug in your known values for P, V, R, and T.

Show your calculations from Experiment 1 for converting your volume (V) from milliliters (mL) to liters (L).

Question 5 options:

Question 6 (8 points)
The goal for Experiment 1: Ideal Gas Law – Finding Percent H2O2 with Yeast is to find the percentage of hydrogen peroxide in the solution. To determine percentage, you need to first determine how many moles of hydrogen peroxide are present. Rearrange PV=nRT to solve for n, then plug in your known values for P, V, R, and T.

Show your rearrangement of the ideal gas law equation from Experiment 1 to solve for n. Then plug in your P, V, R, and T values (using proper units) and solve.

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Question 7 (8 points)
Show your calculations from Experiment 1: Ideal Gas Law – Finding Percent H2O2 with Yeast for determining the theoretical number of moles of O2 if the hydrogen peroxide were a 100% solution.

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Question 8 (8 points)
Using the actual moles of O2 you determined from your experiment (n) and the theoretical moles of O2 you just calculated, show your calculations from Experiment 1: Ideal Gas Law – Finding Percent H2O2 with Yeast for determining the percent hydrogen peroxide in your experimental sample.

Question 8 options:

Question 9 (8 points)
The bottle of hydrogen peroxide you used in Experiment 1: Ideal Gas Law – Finding Percent H2O2 is labeled as a 3% solution (the same as store-bought hydrogen peroxide). Do your experimental results support this (with consideration given to experimental error)? Show your calculations for your percent error of your results.

Question 9 options:

Question 10 (10 points)
Upload your picture of your flask/balloon apparatus (Step 5). See Figure 5: Gas collection apparatus sample in the eScience procedure. To receive credit, your pot, water, flask, and inflated balloon must be clearly visible in the picture, as well as clear label with your name, the lab title (with Experiment number), and the date in clear view. This must be a single picture.

Question 10 options:

Question 11 (8 points)
Upload your picture of your completed Table 3: Charles’ Law Part 1 Data (Step 6).

Question 11 options:

Question 12 (8 points)
How does the molecular motion of the air particles explain your results in Experiment 2: Charles’ Law, Part 1? Note that the pressure on the surface of the balloon remained constant, at atmospheric pressure. Be as detailed as possible with your answer to receive full credit.

Question 12 options: