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Graded Homework #2 (25+5 points)
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explain how you arrived at your answer. Do NOT simply state the final answer. Simply stating the answer
will earn zero poin
10 Effect of Electrolytes on Chemical Equilibria
10A The Effect of Electrolytes on Chemical Equilibria
H3AsO4 + 3I- + 2H+ H3AsO3 + I3- + H2O
Added electrolyte: Ba(NO3)2, K2SO4, NaClO4; [I3-] , color
Fig. 10-1 Effect of electrolyte conc. on
conc.-based e
11 Solving Equilibrium Problems for Complex Systems
When water is saturated with sparingly soluble BaSO4:
(11-1)
BaSO4(s) Ba2+ + SO42SO42- + H3O+ HSO4- + H2O
2H2O H3O+ OH-
(11-2)
(11-3)
1. if added [H3O+]: 11-2 shifted to the right,
[SO42-] , solubility o
Graded Homework #1 (25 points)
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that you explain how you arrived at your answer. Do NOT simply state the final answer. Simply
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CHM 325
Practice Exam for Test #1
(chapters 1,2,4-9)
Instructor: O. Graudejus
Points: 150
Print Name
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Student I.D. #
1. Be sure your exam has 10 pages including this page.
2. Print your name, sign and write your student ID on page 1 NOW.
3. Write
CHM 325, Summer 2015
Test #1
1 June 2015
Instructor: O. Graudejus
Points: 150
Print Name
Sign Name
Student I.D. #
1. Be sure your exam has 13 pages including this page.
2. Print your name, sign and write your student ID on page 1 NOW.
3. Write your last n
Statistical data analysis
Chapter 7
Confidence intervals
For the case of a known mean
For the case of an unknown mean
Hypothesis tests
Comparing an experimental mean with a known value
Comparison of two experimental means
CHM 325 Dr. O. Graudejus
1
Sampling, standardization and calibration
Book Chapter 8
Topics to be covered:
Sample size, analyte concentrations, sampling
External standards and calibration
Least squares methods
Internal standards
Sensitivity and detection limit
Dynamic range
CH
Suggested homework questions for chapter 9
Analytical Chemistry (Skoog, 8th edition): The numbers in parenthesis refer to the question number in
the textbook.
Question 1:
Identify the acid on the left and its conjugate base on the right in the following
e
Suggested homework questions for chapter 5+6
Analytical Chemistry (Skoog, 8th edition): The numbers in parenthesis refer to the question number in
the textbook.
Chapter 5:
Question 1:
A method for the analysis of gold yields weights that are low by 0.4 mg
Aqueous solutions and equilibria
Chapter 9
Content:
chemical equilibrium
the strength of acids and bases
solubility product
common ion effect
buffer solutions
1
Chemical Equilibrium:
General example:
wW + xX
Kinetics of the reaction:
k1
k2
yY + zZ
k1
Graded Homework #1 (25 points)
To earn the credit points for the homework, answer each section of the question below. Make
sure that you explain how you arrived at your answer. Do NOT simply state the final answer.
Simply stating the answer will earn zero
CHM 325 Summer 2015
Test #2
15 June 2015
Instructor: O. Graudejus
Points: 150
Print Name
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Student I.D. #
1. Be sure your exam has 10 pages including this page.
2. Print your name, sign and write your student ID on page 1 NOW.
3. Write your last n
Graded Homework #1 (25 points)
To earn the credit points for the homework, answer each section of the question below.
Make sure that you explain how you arrived at your answer. Do NOT simply state the
final answer. Simply stating the answer will earn zero
CHM 325
Summer 2015
Practice Exam for Test #2
(chapters 9 (buffers) 17D3)
Instructor: O. Graudejus
Points: 150
Print Name
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Student I.D. #
1. Be sure your exam has 9 pages including this page.
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Complexation Reactions and Titrations
Chapter 17
1
Metal complex / Coordination complex
Species in which a central metal atom or ion is covalently bonded to
electron pair donating atoms or anions
the bonding electron pair is provided by the electron dono
CHM 325, Summer 2013
Test #1
3 June 2013
Instructor: O. Graudejus
Points: 100
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1. Be sure your exam has 12 pages including this page.
2. Print your name, sign and write your student ID on page 1 NOW.
3. Write your last n
CHM-325 Cliker Question and Answer :
SUMMER 2015
Instructor: O. Graudejus
Day-4
1.The pKa of H2O is 15.7. What is the conjugate base of H2O and what is its Kb?
1. H3O+ ; 1.7
2. H3O+ ; -1.7
3. OH- ; 1.7
4. OH- ; -1.7
5. OH- ; 50
answer-5
pKa+pKb=14 15.7 +p
Analytical Chemistry
CHM 325
Final Exam
December 8, 2014
NAME
STUDENT ID
Please read this carefully before you start your test:
1. Fill in your name on this cover sheet.
2. The test contains 29 questions in total. There are 92 points possible. This exam w
Suggested homework questions for lecture 7
Analytical Chemistry (Skoog, 8th edition): The numbers in parenthesis refer to the question number in
the textbook.
Question 1:
Consider the following replicate measurement: 3.5, 3.1, 3.1, 3.3, 2.5
Calculate the
Suggested homework questions for lecture 7
Analytical Chemistry (Skoog, 8th edition): The numbers in parenthesis refer to the question number in
the textbook.
Question 1:
Consider the following replicate measurement: 3.5, 3.1, 3.1, 3.3, 2.5
Calculate the
12 Gravimetric Methods of Analysis
Gravimetric analysis: based upon mass measurements
highly accurate and precise.
- Isolation (pure known substance) & weighing
*Advantages
1. accuracy
2. single fundamental chemical precipitation reaction
ex: Cl- + Ag+ Ag
6 Random Errors in Chemical Analysis
6A The Nature of Random Errors
6A-1 Random Error Sources?
Fig. 6-1 Three-dimensional
plot showing absolute error in
Kjeldahl nitrogen
determination for four different
analysts.
Analyst
Precise
Accurate
1
2
3
4
Table 6-
9 Aqueous Solutions and Chemical Equilibrium
9A The Chemical Composition of Aqueous Solutions
9A-1 Classifying Solutions of Electrolytes
Table 9-1 Classification of Electrolytes
Strong
Weak
1. Inorganic acids such as HNO3,
HClO4, H2SO4, HCl, Hl, HBr,
HClO
7 Statistical Data Treatment and Evaluation
7A Confidence Intervals
7A-1 Finding the confidence interval when is known or s is a good
estimate of
CI = x z
CI for = x
z
N
Confidence Levels for Various Values of z
CL, %
50
68
80
90
95
z
0.67
1.00
1.28
1.6
2 Chemicals, Apparatus and Unit Operations of
Analytical Chemistry
2A Selecting and Handling Reagents and Other Chemicals
NIST (The National Institute of Standards and Technology)
2A-1 Classifying Chemicals
Reagent Grade
Reagent Chemical Committee of the
ACID-BASE EQILIBRIUM SYSTEMS
For all the acid base equilibrium systems we can
write down
Mass balance equation
Charge balance equation
Mass Balance Equation
Mass Balance Equation
The quantity of all species in a solution containing a
particular atom (or
MMA
3.8_A_Standard Deviation_Problems
Name: _
Date: _
Despite the variety of graphs used in business and the popular press, there are only a few basic
styles, and generally straightforward criteria for which to use in each situation. The object of
graphin
5 Errors in Chemical Analyses
Replicates:
the same size samples are carried
through an analysis in exactly the
same way (2~5).
Fig. 5-1 Results from six replicate
determinations of iron in aqueous
samples of a standard solution
containing 20.0 ppm iron(II