Chemistry: Equilibrium and LeChatelier's principle

These are practical questions to be done in lab, for writing a solution/calculation with no values/experimental results please make an educated guess because the prac is yet to be done. For the other questions please try to be as specific as possible. Read the document I uploaded (it has procedures and other useful material). Cheers.

 

Question 1

a) Write down the overall equation showing the formation of [Fe(acac)3] from [Fe(H2O)6] 3+ and acetylacetone [Fe(H2O)6] 3+(aq) + 3acacH(aq) [Fe(acac)3](aq) + 6H2O(l) +3H+ (aq).

 

b) What reagent (chemical agent) do you weigh out that ends up being the source of the [Fe(H2O)6] 3+?

 

Question 2

a) Circle the correct word in bold text to complete the following statements: A pH of less than 7 means a solution is acidic/basic. A pH of greater than 7 means a solution is acidic/basic.

 

 

b) The equation showing acetylacetone, acacH, forming the acac¯ ion is below:

                                              acacH => acac¯ + H+

What is it about this equation that results in a solution of acacH being slightly acidic?

 

c) Given that sodium acetate is a base (remember that sodium acetate can be considered as sodium ions and acetate ions), complete the following equation showing the reaction of acetate ions with H+ :

                                             CH3COO– + H+ => _________

Question 3

a) What is the connection between the two equations below?

                                            acacH => acac¯ + H+

                                            [Fe(H2O)6] 3+ + acac¯ =>  [Fe(H2O)4(acac)]2+ + 2H2O

 

b) Using your answer to Question 3(a), explain why the pH of a mixture of [Fe(H2O)6] 3+ and acacH is lower than a solution of either of the components by themselves.

 

c) Explain why the pH increases on addition of sodium acetate.

 

d) Therefore, explain why more [Fe(acac)3] is produced after the addition of sodium acetate. (Hint: use the Equation [Fe(H2O)6] 3+(aq) + 3acacH(aq) [Fe(acac)3](aq) + 6H2O(l) +3H+ (aq)  and Le Châtelier’s Principle.) (refer to the document for the principle).

 

Question 4: [Pg 11 on the document, also need to scroll back to Part 1 to answer this]

 

a) Steps 1 and 2 in the PROCEDURE describe test tubes A and B in Diagram 1. Test tube A should contain the neutral [Fe(acac)3] complex synthesised in Part One and polar water, test tube B should contain [Fe(acac)3] and non-polar dichloromethane. Using the idea of “like dissolves like”, which test tube – A or B – do you predict will contain the dissolved [Fe(acac)3]? (Hint: see the notes on solubility in the Introduction section for help.)

 

b) If the intensity of the colour of the solutions can be taken as a rough guide as to the concentration, which solvent layer in test tube B, the top or the bottom, contains the most [Fe(acac)3]?

 

c) Is the layer you chose in question 4 (b) the polar (water) layer or the non-polar (dichloromethane) layer?

 

Question 5

 

a) Complete the equations that describe the stepwise formation of the tris-acac iron complex, [Fe(acac)3]:

 

1)                                      [Fe(H2O)6] 3+ + acac¯        =>       [Fe(H2O)4(acac)]2+ + 2H2O

2)                                      _________________         =>       ______________________

3)                                      _________________         =>       [Fe(acac)3] + 2H2O

 

For questions 5 b, and question 6, refer to the word document.

Goodluck.

 

 

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List four factors affecting galvanic or dissimilar metal corrosion that make calculating exact corrosion rates difficult when data is extrapolated into large scale engineering situations. (4 Marks)

 List four factors affecting galvanic or dissimilar metal corrosion that make calculating exact corrosion rates difficult when data is extrapolated into large scale engineering situations. (4 Marks) 

 

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write a 6

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CHEMU7AS

SEE ATTACHMENT 5 MUL CHOICE QUES. 4 FILL IN THE BLANK

 

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150 words

 

Renewable energy comes from the wind, the oceans, or geothermal sources, not just from the Sun or from biofuels.  Pick one of these renewable energy sources and learn more about the current technology available to harness it.

present the following :  name the geographic restrictions for your type of energy (if any)

Present both a reason (or reasons) to support this technology and a difficulty or problem with this technology.

Could this technology be used where you live? 

Would it be better in a large scale situation, or could it be used in a small scale situation? 

Your original threads need to contain a minimum of 150 words – 

      To get full points, you need to respond to the post of at least two of your  fellow students.  Those responses should be at least 50 words in length. These responses must be completed by midnight Sunday Feb [email protected] 5pm

 10 points for the forum: 6 points for an original thread,  and 2 point each for the two responses.

 

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CHE 350

ChE 350 Problem Set 4 Due Thursday February 11, 2016 1. Radioactive waste (kw = 20 Wm-1 K-1 ) is to be stored in spherical stainless steel (ks = 16 Wm-1 K-1 ) containers. Heat generation occurs uniformly within the radioactive waste at a volumetric rate of 100 kWm-3 , while the outer surface of the container is cooled by 25˚C water with a convective heat transfer coefficient of h = 1000 Wm-2 K-1 . a. Safety considerations require that the maximum steady-state temperature of the system remain below 475˚C. Will a spherical container with inner and outer diameters of 1.0 m and 1.2 m, respectively, satisfy this requirement? b. Determine the steady-state temperature at the outer surface of the container in part (a). c. It is proposed to use a spherical container of 1.0 m inner diameter for storing radioactive waste with the same thermal conductivity but twice the volumetric heat generation rate. Safety considerations require that the container wall thickness be no less than 4 cm. If the outside heat transfer coefficient can be increased up to a maximum value of 5000 Wm-2 K-1 , determine if the proposed design is feasible. If so, recommend operating and design conditions for h and container wall thickness, respectively. 2. A spherical reactor with diameter of 20 cm is filled with a reacting mixture undergoing an exothermic reaction that generates heat uniformly at a temperature-dependent volumetric rate of Qoexp(-A/T), where Qo = 5 kWm-3 , A = 75 K and T is the mixture temperature in K. The reactor is enclosed in an insulation layer (k = 0.05 Wm-1 K-1 , ε = 0.9) of 8-mm thickness. The exterior surface of the insulation layer is exposed to 25˚C air with convective heat transfer coefficient of h = 5 Wm-2 K-1 , and also exchanges radiation with the surrounding surfaces that are at 35˚C. The thickness of the reactor wall is negligibly small and the reactant mixture is well stirred so that the reactant mixture and the reactor wall may be considered to be at the same temperature. a. What are the steady-state temperatures of the reacting mixture and the outer surface of the insulation? b. You are asked to maintain a steady-state reactor temperature of 95˚C. At the same time, to avoid potential burn injuries to those who may come into contact with the exposed surface of the insulation, we would like to keep the temperature at the outer surface of the insulation below 45˚C. Plot the outer surface temperature and the reactor temperature as a function of insulation thickness (in the range of 0 to 10 mm). Is increasing the insulation thickness a practical solution? c. (Extra credit) What other parameter could be varied to achieve the desired reactor operation? Provide quantitative justification. 3. Aluminum cylindrical-spine fins (k = 205 Wm-1 K-1 ) with diameters d = 2, 5, and 10 mm are to be used in a convection environment with h = 40 Wm-2 K-1 . If all fins are of length L = 5 cm, use the result obtained in class for an insulated-tip fin of constant cross-sectional area to answer the following questions. a. Compare the relative performance of the fins in terms of heat transfer rate. b. Compare the relative performance of the fins in terms of heat transfer rate per unit mass.

 

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Data Visualization Project Plan

  

You are responsible to create a Data Visualization project plan. Plan the process and implementation for completing the project. You should identify a data visualization problem and corresponding data set. You are responsible to build a project plan for the management team of a company. The plan should include a sample prototype of the final product (graph/chart). 

Make sure to include the following information:

· Data Visualization Development

o Data Visualization Project Planning

o Software Tools and Environment

· Data Visualization Development Process

o Data Acquisition

· Data Examination

· Data Transformation

· Data Exploration

Deliverables:

Final Research Paper [APA format] 

o The paper should be well written with references.

o Should be more than 10 pages in length.

o Include a cover page, abstract, Table of Contents and references

I have written outline you can start with that. Also, for data set example, please use below url. 

https://cloud.vitara.co/VitaraChartsPlayLive/servlet/mstrWeb?evt=3140&src=mstrWeb.3140&documentID=1A535D4E4EA4F951A5DE699B47FBB353&mstrWeb=-*-zguTGGR4rMcKJ1Pi*-sSyQoaBEA5YJpZ9vXDhiA%3D%3D.MicroStrategy+Tutorial.*-D76*-t6KLivMz1Clt_&innerWidth=1280&innerHeight=620&Server=VITARA-MSTR-PROD03&Port=0&Project=MicroStrategy+Tutorial&

 

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Chemistry 1111 homework

I need someone to do my chemistry homework that is due tomorrow, It has 15 question

 

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chemistry lab intro

I need someone to write me an introduction to use  for my chemistry lab’s report out of the attached two file

 

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Practical Connection Assignment for Course : (Analyzing and Visualizing Data)

  

Practical Connection Assignment for  Course : (Analyzing and Visualizing Data)

it is a priority that students are provided with strong educational programs and courses that allow them to be servant-leaders in their disciplines and communities, linking research with practice and knowledge with ethical decision-making. This assignment is a written assignment where students will demonstrate how this course research has connected and put into practice within their own career.

Assignment:
Provide a reflection of at least 500 words (or 2 pages double spaced) of how the knowledge, skills, or theories of this course (Analyzing and Visualizing Data) have been applied, or could be applied, in a practical manner to your current work environment. If you are not currently working, share times when you have or could observe these theories and knowledge could be applied to an employment opportunity in your field of study. 

Requirements:

Provide a 500 word (or 2 pages double spaced) minimum reflection.

Use of proper APA formatting and citations. If supporting evidence from outside resources is used those must be properly cited. 

Share a personal connection that identifies specific knowledge and theories from this course. (Analyzing and Visualizing Data) 

Demonstrate a connection to your current work environment. If you are not employed, demonstrate a connection to your desired work environment. 

You should NOT, provide an overview of the assignments assigned in the course. The assignment asks that you reflect how the knowledge and skills obtained through meeting course objectives were applied or could be applied in the workplace. 

 

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