Consumer Chemistry: Determining the Iron Content in Supplements
.pdf
keyboard_arrow_up
School
Stockton University *
*We aren’t endorsed by this school
Course
2150
Subject
Chemistry
Date
Dec 6, 2023
Type
Pages
2
Uploaded by MinisterPonyPerson917
CHEM 2115 Lab Report
Experiment
#8
Iron Content of Vitamins
Chem I Lab
N
ame Samuel Zheng
Section #
009
Station #
D4
Date
11/26/2023
A. Preparation of Standard Curve
Attach a copy of your previously prepared standard curve with the equation of the best-fit line included on the
plot.
B.
Vitamin Unknowns – Data & Calculations
Tablet Name
ShopRite Iron
Mass (on label) of iron per tablet (mg)
65
Be sure to include the necessary units for the values reported in the above tables.
Attach sample calculations of
each type necessary to obtain the results in the above table.
These should include the equations used,
substituted values, appropriate units, and results.
C.
Class Data Analysis
Class data for this experiment can be downloaded from a Blackboard file in which each student will have
entered the brand of tablet studied, the mass of iron from the label, and the absorbance of Solution 3.
For each
brand, compute the average mass of iron per tablet as determined experimentally.
Then compute the relative
error compared to the mass of iron per tablet indicated on the label.
Complete the following detailing the results of your data analysis.
The table has four columns:
Tablet name,
Mass iron per tablet, label (mg), Mass iron per tablet, experimental (mg), and Relative Error (%).
Note any data
points that were discarded in the averaging and justify their exclusion from your calculations
Trial 1
Trial 2
Measured Absorbance (Solution 3)
0.908
1.057
Concentration of iron (Fe
+2
) in Solution 3
2.26
2.63
Concentration of iron (Fe
+2
) in Solution 1
910.2
1060
Mass of iron in tablet
91.02mg
106mg
Average mass of iron in tablet
98.51
mg
Relative Error (compared to mass on label)
51.55%
Excluded data points & justification:
D.
Questions
1.
Comment on the relative error in your data and the class data.
What are possible sources of error that could
lead to the observed differences between the mass of iron per tablet listed on the label and the mass per
tablet determined experimentally?
Be specific, for example “human error” is not an acceptable. Your
sources of error should be consistent with the observed differences.
The relative error for Tablet A, B, and C respectively are 2.18%, 8%, and then 13.29%. Some
sources of error may include adding too much water to the flasks, tablets not fully dissolved in the acid,
and then not calibrating the spectrophotometer correctly.
2.
Suppose that a student does not remove fingerprints from the cuvette before the absorbance of a test solution
is measured.
What would happen to the measured absorbance?
Would the calculated mass of iron in the
tablet for this trial be too large, too small, or unaffected by this error?
Explain why.
If fingerprints were not removed using the Kimwipe, then the light will not be able to pass through
the cuvette effectively. The measured absorbance will be affected because of this. The mass of the iron
will be too high since not enough light was passed through.
3.
Suppose a student analyzes an unknown tablet as described in the experimental procedure and the
absorbance of the resulting Solution 3 is determined to be 1.250, which is higher than any value from your
standard curve.
What might the student do in order to determine the amount of iron in this sample without
making new standard solutions?
A student can add more water to dilute the tablet to determine the amount of iron in the sample
without the need to make new standard solutions. A smaller volume can be taken into account as well.
Tablet
N
ame
Mass iron per tablet, label
(mg)
Mass iron per tablet, experimental
(mg)
Relative error
(%)
A
45
44.15
2.18%
B
28
30.24
8%
C
65
56.36
13.29%
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Related Questions
1. A candle is placed on one pan of a balance, and an equal weight is placed on the other pan.
What would happen if you lit up the candle and waited for a while?.
2. Suppose the candle was placed in a large, sealed jar that allowed it to burn for several
minutes before running out of oxygen. The candle and jar are balanced by an equal weight.
In this situation, what would happen if you lit up the candle and waited?
Gizmo Warm-up
Burning is an example of a chemical reaction. The law of conservation of matter states that
no atoms are created or destroyed in a chemical reaction. Therefore, a balanced chemical
equation will show the same number of each type of atom on each side of the equation.
To set up an equation in the Chemical Equations Gizmo, type the chemical formulas into the
text boxes of the Gizmo. First, type in "H2+02" in the Reactants box and "H20" in the
Products box. This represents the reaction of hydrogen and oxygen gas to form water.
Reactants
H2+O2
2. Based on what you…
arrow_forward
two partners were trying to solve the equation. Penny Said that the equation is balanced because there is only 1 Fe on both sides of the equation. But Alex disagrees. Who is correct and why? Write the CER to explain your answer. claim: Evidence: Reasoning
arrow_forward
I need help answering 2. Functional groups in aspirin
arrow_forward
None
arrow_forward
5
please help! *urgent*
write as many accurate and relevant statements about the picture below. please write more than 5 correct descriptions/statements. please be as descriptive as possible.
arrow_forward
education.wiley.com
+
00
D2L Topic 4 (Chapter 3 and 12) Online Home...
W NWP Assessment Builder UI Application
W NWP Assessment Player UI Application
C Question 17 Of 50 -/1 = View Policies Cur...
b Similar Questions | bartleby
E Topic 3 (Chapter 3 and 12) Online Homework Assignment
Question 15 of 50
0/1 E
View Policies
Show Attempt History
Current Attempt in Progress
Incorrect.
Write a balanced equation for the formation reaction of each of the following substances:
(a) K3PO4(s)
(b) acetic acid, CH3CO2H(I)
(c) trimethylamine, (CH3)3N(g)
(d) bauxite, Al203(s)
eTextbook and Media
Save for Later
Attempts: 1 of 3 used
Submit Answer
arrow_forward
Now let's use these total masses to figure out how much CO2 was generated by the experiment.
Remember, the amount of CO2 generated is the mass lost after the reaction, all of the other products
are still in the cups. Calculate both the grams and moles of CO2.
Sample Data for Vinegar Lab
Total Mass of
Total Mass of
Baking Soda & Baking Soda &
g CO2 Produced by moles CO2 Produced by
Vinegar Cups Vinegar Cups (g,
post)
Reaction
Reaction
(g, pre)
-2 g
56.94
44.26
NaHCO3
-4 g
59.59
57.55
NaHCO3
-6 g
63.37
61.07
NaHCO3
-8 g
66.68
64.58
NaHCOз
-10 g
69.81
67.66
NaHCO3
arrow_forward
Q
A
Z
8:13 AM Sat Mar 11
Status
Exam
@
2
W
S
Final Exam
X
Consider this partial recipe for homemade
granola to help answer the question.
Yield: 6 Servings
4 cups rolled oats
1/3 cup honey
1/2 cup walnuts
1/2 cup raisins
Copyright © 2003-2023 International Academy of Science. All Rights Reserved.
3
Limiting Reactants
19.
E
Granola
D
[a]
R
F
%
LO
5
T
G
6
Y
H
...
&
7
N
U
Which material is the limiting
ingredient if you have 12 cups
of oats, 6 cups of honey, 1 cup
of walnuts, 3 cups of raisins?
A. raisins
B. honey
C. oats
D. walnuts
J
* CO
8
M
9
K
0
Q.
1 100%
38
arrow_forward
Using the data table 1 please fill the data table 2
arrow_forward
Review
A Bookmark
ole Concept S21 / 13 of 16
What mass of hydrogen sulfide, H2S, will completely react with 2.00 moles of silver nitrate, AGNO3?
2AGNO, +H2S –→ Ag,S +2HNO3
O A. 34.1 grams
O B. 46.3 grams
O C. 64.2 grams
O D. 17.0 grams
arrow_forward
The image uploaded answer is not allowed please bro hero expert
arrow_forward
Multiple Choice. Read and analyze each question. Write the letter that
corresponds to your answer on a separate sheet of paper.
1. Suppose your classmates will be visiting you. You decided to make burger for their
snack. You have 20 burger patties and 17 burger buns, how many burgers you can
make?
а. 20
b. 17
с. 3
d. 37
2. Based on problem 1, what is the limiting reactant?
a. burger buns
b. burger patties
c. your classmates
d. your budget
3. Based on problem 1, how many burger patties are extra after your preparation for
snack?
с. 17
d. 3
a. 0
b. 37
For numbers 4-10. If 68 g of Zn reacts with 27.5 g of HC1. Use the chemical equation
to answer the following questions below.
Zn + 2HC1
ZnCl2 + H2
4. What is the molar mass of Zn?
a. 65 g/mol
b. 30 g/mol
c. 27 g/ mol
d. 68 g/ mol
5. What is the molar mass of HC1?
a. 2 g/mol
b. 16 g/mol
6. What coefficient is indicated in HCl?
c. 36 g/mol
d. 68 g/mol
c. 4
d. 5
a. 2
b. 3
7. Which substance is limiting reactant?
a. ZnCl2
b. HCl
8. Which…
arrow_forward
Put approx. 10 mL of vinegar (HC2H3O2) in a short glass bottle and add 1 piece
of rust-free small iron nail. Write your observation after 24 hours. A. Results and
observation:
2
B. Balanced chemical equation:
C Calculation Do
arrow_forward
Please help me BALANCE this chemical equations (just exercises 19-27)
arrow_forward
alibri (Body)
12
A A
Aa v
AaBbCcDc AaBbCcDc AaBbC AABBCCC AaB AABBCCD
IU abe x, x
A
ab
T Normal
T No Spac. Heading 1
Heading 2
Title
Subtitle
Font
Paragraph
Styles
3
6 IZICIt iniED 10 11 12
13 I 14 I-
15
16 .
Chemical Equation
Write a balanced equation that describes each of the following chemical reaction.
1. Acetylene gas, C2H2, burns in air forming gaseous carbon dioxide and, CO2, and water.
Answer: 2C2H2 + 502 → 4CO2 + 2H20 (double displacement/Combustion reaction)
2. MnO2 + KOH + O2 → H20 + K2MNO4
3. FeCl2 + Cl2 → FeCl3
English (United States)
Accessibility: Good to go
a
ENG
REDMI NOTE 10 PRO | JHANG
01/06/2022 15: 12
arrow_forward
Wellness Faculty Mo
Use the following information to answer this question.
smoke
CO2 + H,0
02
hydrocarbons
What type of chemical reaction is represented in the diagram?
Select one:
O a.
a single-replacement reaction
O b.
No reaction is represented.
c.
a combustion reaction
d.
a formation reaction
O Smoke Signal.pdf
arrow_forward
[References]
Use the References to access important values if needed for this question.
When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are:
hydrogen peroxide (H2O2) (aq)
water (1) +
oxygen (g
Submit Answer
Try Another Version
4 item attempts remaining
O OWLV2 | Online tea...
arrow_forward
What is the balance coefficient
arrow_forward
hello please help using the completed table
arrow_forward
Please correct answer and don't use hand rating
arrow_forward
Help me find the expected mass of calcium carbonate (g)
arrow_forward
Show ALL work. Remember to follow significant digit rules and show proper format in all answers.
NOTE: Record all molar mass values to 2 decimal places.
Question:
Calculate the mass in grams of 4.25 moles of Ag2S?
arrow_forward
2 Fe + Oz →2 FeO
1. The numbers in red boxes are...
A. subscripts
B. coefficients
C. reactants
D. products
2. The chemicals in the purple box are...
A. subscripts
B. coefficients
C. reactants
D. products
arrow_forward
1. Moles of NaHCO3 and NaCl:2. Mole Ratio:3. How does your experimental ratio compare to the theoretical? If they are different,explain what might have caused the difference.4. Calculate the percent error.
arrow_forward
[References]
This question has multiple parts. Work all the parts to get the most points.
Siderite is a mineral consisting largely of iron(II) carbonate. Write an overall, balanced equation for its reaction with nitric acid, and name the products.
(Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
Submit
Visited
pt
pr
Submit Answer
Try Another Version
10tem attempts remaining
1 pt
1 pt
1 pt
1 pt
Previous
Next
9:37 PM
6/22/2021
66°F
e to search
arrow_forward
Balance please
arrow_forward
Which substances can be related, inform the Gravimetric Factor.
arrow_forward
How many moles of aluminum are in an aluminum block that meausres 3.00cm x 3.00 cm x 5.00cm? The density of aluminum is 2.70 g/cm3.
a. 121.5 moles
b. 45 moles
c. 6.25 moles
d. 27 moles
e. 4.5 moles
arrow_forward
In the PHET simulation, click on the Game icon at the bottom of the screen. Balance the given chemical equations by changing the coefficients placed before each compound and then clicking Check. When a reaction is balanced
correctly a yellow face will appear with a smile.
After practicing with the game, balance the given chemical equations without use of the simulation.
Drag the appropriate labels to their respective targets. Leave the target empty for a coefficient of 1.
• View Available Hint(s)
Reset
Help
3
NaOH
O Na,C,0,
4
H,C,0,
Fe, 0,
Fe
co2
arrow_forward
I was given the stared calculations. *
please check my other work and fill in the rest. Thank you
arrow_forward
Please send me the question in 20 minutes it's very urgent plz
arrow_forward
NOTE: no need for explanation, just answer each number with correct letter.
arrow_forward
HSC 258
Major Projec X
Mind Tap - Cengage Lea X
d%3D55750828934189288909969212&elSBN=9781305657571&snapshotld%3D219989
The illustration to the left represents a mixture of
iodine ( purple ) and fluorine ( green )
molecules.
If the molecules in the above illustration react to form IF3 according to the equation
I +3 F2 2 IF3 ,
the limiting reagent is
the number of IF, molecules formed is
and
the number of
atoms/molecules in excess is
Submit Answer
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781259911156
Author:Raymond Chang Dr., Jason Overby Professor
Publisher:McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9780078021558
Author:Janice Gorzynski Smith Dr.
Publisher:McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...
Chemistry
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY
Related Questions
- 1. A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What would happen if you lit up the candle and waited for a while?. 2. Suppose the candle was placed in a large, sealed jar that allowed it to burn for several minutes before running out of oxygen. The candle and jar are balanced by an equal weight. In this situation, what would happen if you lit up the candle and waited? Gizmo Warm-up Burning is an example of a chemical reaction. The law of conservation of matter states that no atoms are created or destroyed in a chemical reaction. Therefore, a balanced chemical equation will show the same number of each type of atom on each side of the equation. To set up an equation in the Chemical Equations Gizmo, type the chemical formulas into the text boxes of the Gizmo. First, type in "H2+02" in the Reactants box and "H20" in the Products box. This represents the reaction of hydrogen and oxygen gas to form water. Reactants H2+O2 2. Based on what you…arrow_forwardtwo partners were trying to solve the equation. Penny Said that the equation is balanced because there is only 1 Fe on both sides of the equation. But Alex disagrees. Who is correct and why? Write the CER to explain your answer. claim: Evidence: Reasoningarrow_forwardI need help answering 2. Functional groups in aspirinarrow_forward
- Nonearrow_forward5 please help! *urgent* write as many accurate and relevant statements about the picture below. please write more than 5 correct descriptions/statements. please be as descriptive as possible.arrow_forwardeducation.wiley.com + 00 D2L Topic 4 (Chapter 3 and 12) Online Home... W NWP Assessment Builder UI Application W NWP Assessment Player UI Application C Question 17 Of 50 -/1 = View Policies Cur... b Similar Questions | bartleby E Topic 3 (Chapter 3 and 12) Online Homework Assignment Question 15 of 50 0/1 E View Policies Show Attempt History Current Attempt in Progress Incorrect. Write a balanced equation for the formation reaction of each of the following substances: (a) K3PO4(s) (b) acetic acid, CH3CO2H(I) (c) trimethylamine, (CH3)3N(g) (d) bauxite, Al203(s) eTextbook and Media Save for Later Attempts: 1 of 3 used Submit Answerarrow_forward
- Now let's use these total masses to figure out how much CO2 was generated by the experiment. Remember, the amount of CO2 generated is the mass lost after the reaction, all of the other products are still in the cups. Calculate both the grams and moles of CO2. Sample Data for Vinegar Lab Total Mass of Total Mass of Baking Soda & Baking Soda & g CO2 Produced by moles CO2 Produced by Vinegar Cups Vinegar Cups (g, post) Reaction Reaction (g, pre) -2 g 56.94 44.26 NaHCO3 -4 g 59.59 57.55 NaHCO3 -6 g 63.37 61.07 NaHCO3 -8 g 66.68 64.58 NaHCOз -10 g 69.81 67.66 NaHCO3arrow_forwardQ A Z 8:13 AM Sat Mar 11 Status Exam @ 2 W S Final Exam X Consider this partial recipe for homemade granola to help answer the question. Yield: 6 Servings 4 cups rolled oats 1/3 cup honey 1/2 cup walnuts 1/2 cup raisins Copyright © 2003-2023 International Academy of Science. All Rights Reserved. 3 Limiting Reactants 19. E Granola D [a] R F % LO 5 T G 6 Y H ... & 7 N U Which material is the limiting ingredient if you have 12 cups of oats, 6 cups of honey, 1 cup of walnuts, 3 cups of raisins? A. raisins B. honey C. oats D. walnuts J * CO 8 M 9 K 0 Q. 1 100% 38arrow_forwardUsing the data table 1 please fill the data table 2arrow_forward
- Review A Bookmark ole Concept S21 / 13 of 16 What mass of hydrogen sulfide, H2S, will completely react with 2.00 moles of silver nitrate, AGNO3? 2AGNO, +H2S –→ Ag,S +2HNO3 O A. 34.1 grams O B. 46.3 grams O C. 64.2 grams O D. 17.0 gramsarrow_forwardThe image uploaded answer is not allowed please bro hero expertarrow_forwardMultiple Choice. Read and analyze each question. Write the letter that corresponds to your answer on a separate sheet of paper. 1. Suppose your classmates will be visiting you. You decided to make burger for their snack. You have 20 burger patties and 17 burger buns, how many burgers you can make? а. 20 b. 17 с. 3 d. 37 2. Based on problem 1, what is the limiting reactant? a. burger buns b. burger patties c. your classmates d. your budget 3. Based on problem 1, how many burger patties are extra after your preparation for snack? с. 17 d. 3 a. 0 b. 37 For numbers 4-10. If 68 g of Zn reacts with 27.5 g of HC1. Use the chemical equation to answer the following questions below. Zn + 2HC1 ZnCl2 + H2 4. What is the molar mass of Zn? a. 65 g/mol b. 30 g/mol c. 27 g/ mol d. 68 g/ mol 5. What is the molar mass of HC1? a. 2 g/mol b. 16 g/mol 6. What coefficient is indicated in HCl? c. 36 g/mol d. 68 g/mol c. 4 d. 5 a. 2 b. 3 7. Which substance is limiting reactant? a. ZnCl2 b. HCl 8. Which…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781259911156
Author:Raymond Chang Dr., Jason Overby Professor
Publisher:McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9780078021558
Author:Janice Gorzynski Smith Dr.
Publisher:McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...
Chemistry
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY