Your Perfect Assignment is Just a Click Away

We Write Custom Academic Papers

100% Original, Plagiarism Free, Customized to your instructions!

glass
pen
clip
papers
heaphones

New Oriental how Much Copper Is in A Penny Copper Ammonia Complex Ion Lab Report

New Oriental how Much Copper Is in A Penny Copper Ammonia Complex Ion Lab Report

Question Description

I’m working on a chemistry report and need a sample draft to help me learn.

Question #1. In your own words, describe the goal(s) of this experiment.

undefined

undefined

Data Collection

undefined

Activity #1. Record the following information about your penny in Report Table 1 below.

undefined

Report Table 1 Physical Properties and Characteristics of the Penny.

physical property/characteristic

mass

2.515g

thickness

0.12cm

diameter

1.9cm

year

2019

mint

New, less used

appearance

One black scratch

undefined
undefined

Activity #2. Record your observations of the reaction between the penny and HNO3 here.

undefined

The penny and HNO3 reacts, and the solutions turn blue. Also, Brown gas is produced.

undefined

Calculation #1. Calculate the concentration of Cu2+ (in M) in the stock solution.

undefined

(Include units and show all work.)

undefined

undefined

Calculation #2. Calculate the concentration of [Cu(NH3)4]2+ in Standard Solution #1. Show your work, including units, below. Enter your calculation result in Report Table 2 below.

undefined

undefined
undefined

undefined

Calculation #3. Calculate the concentration of [Cu(NH3)4]2+ in Standard Solutions #2-4. Show Enter your calculation result in Report Table 2 below.

undefined

Report Table 2 Concentrations of [Cu(NH3)4]2+ Standard Solutions.

standard

solution

volume of Cu2+ stock solution added, mL

concentration of [Cu(NH3)4]2+, M

1

2.00

2

4.00

3

6.00

4

8.00

undefined

undefined

Question #2. Wavelength of maximum absorbance: insert your graph of absorbance versus wavelength for [Cu(NH3)4]2+ standard solution #2.

undefined

Be sure to label the axes, provide a title, and clearly indicate ?max.

undefined

?max = _611.4______________ nm

undefined

undefined
undefined

Question #3. Complete Report Table 3 below.

undefined

Report Table 3 Absorbances for Standard Solutions of [Cu(NH3)4]2+.

standard solution

absorbance at _611.4________ nm

1

0.173

2

0.416

3

0.633

4

0.855

undefined

DATA ANALYSIS/CALCULATIONS

undefined

Calibration Plot (Standard Curve) for [Cu(NH3)4]2+

undefined

Question #4. Prepare a calibration plot by plotting absorbance versus concentration of [Cu(NH3)4]2+ for your standard solutions. Create a best-fit line through your data points.

undefined

Insert your graph of absorbance versus concentration of [Cu(NH3)4]2+ for your standard solutions. Be sure to label the axes, provide a title, display the best-fit line (trendline), its equation, and the R2 value on the graph.

undefined

undefined
undefined

undefined

Amount of Copper in Penny

undefined

Calculation #4. Enter the absorbances of the prepared penny solutions in Report Table 5.

undefined

Using your [Cu(NH3)4]2+ calibration plot and the absorbances of your penny solutions, calculate the concentration of [Cu(NH3)4]2+ in each penny solution and record your values in Report Table 5.

undefined

Report Table 4 Concentrations of [Cu(NH3)4]2+ in Penny Solutions.

solution

absorbance at

____611.4_______ nm

concentration of [Cu(NH3)4]2+

(M)

penny sample 1

0.240

penny sample 2

0.240

penny sample 3

0.247

undefined

Calculation #5. Show an example calculation for the concentration of [Cu(NH3)4]2+ using the data in penny sample 1.

undefined

undefined
undefined

undefined

Calculation #6. Calculate the mass (in g) of copper initially present in the penny and the percent by mass of copper in the penny using your data for penny sample 1.

undefined

(Be sure to take into account any dilutions you made when the sample solutions were prepared. Remember that each sample solution contained only a portion of the dissolved penny solution).

undefined

Show your work, including units, below. Enter your results in Report Table 6.

undefined

undefined

Calculation #7. Calculate the mass (in g) of copper initially present in the penny and the percent by mass of copper in the penny using your data for penny samples 2 and 3. Enter your results in Report Table 6.

undefined

Report Table 5 Mass and Percent by Mass of Copper in Penny.

solution

mass of Cu in penny (g)

percentage by mass of Cu in penny

penny sample 1

penny sample 2

penny sample 3

average

undefined
undefined

undefined

Question #6. Find the web site for the United States (US) Mint and record the information for a new penny in Report Table 7 below.

URL for US Mint: _________________________________________________________

Report Table 6 Penny Specifications Provided by United States Mint.

percentage by mass of copper

standard weight

standard diameter

standard thickness

How well do the experimental results for your penny compare to the specifications reported by the US Mint?

Order Solution Now

Our Service Charter

1. Professional & Expert Writers: Executive Papers only hires the best. Our writers are specially selected and recruited, after which they undergo further training to perfect their skills for specialization purposes. Moreover, our writers are holders of masters and Ph.D. degrees. They have impressive academic records, besides being native English speakers.

2. Top Quality Papers: Our customers are always guaranteed papers that exceed their expectations. All our writers have +5 years of experience. This implies that all papers are written by individuals who are experts in their fields. In addition, the quality team reviews all the papers before sending them to the customers.

3. Plagiarism-Free Papers: All papers provided by Executive Papers are written from scratch. Appropriate referencing and citation of key information are followed. Plagiarism checkers are used by the Quality assurance team and our editors just to double-check that there are no instances of plagiarism.

4. Timely Delivery: Time wasted is equivalent to a failed dedication and commitment. Executive Papers is known for timely delivery of any pending customer orders. Customers are well informed of the progress of their papers to ensure they keep track of what the writer is providing before the final draft is sent for grading.

5. Affordable Prices: Our prices are fairly structured to fit all groups. Any customer willing to place their assignments with us can do so at very affordable prices. In addition, our customers enjoy regular discounts and bonuses.

6. 24/7 Customer Support: At Executive Papers, we have put in place a team of experts who answer all customer inquiries promptly. The best part is the ever-availability of the team. Customers can make inquiries anytime.