Module 1: Nature and Scope of Analytical Chemistry
Self-Check Activity 1.1
1. Absorbed water will not change the Amount of the sample
chemical composition of the sample. Nature of the sample
False Accuracy of the method
2. Reliability of experimental results are 14. What are the measurements usually
evaluated as the final step of quantitative needed for quantitative analysis?
analysis. Intensity of light of the analyte
True Mass or Volume of the sample
3. In selecting a method, the accuracy is Mass or Volume of the analyte
sometimes compromised with the 15. Why does the role analytical chemistry
available time and resources. important in many fields of sciences?
True a. Analytical chemistry is a branch of
4. The type of analysis that gives the chemistry that deals with quantification
amounts of species in the sample . and determination of the identity of
Quantitative Analysis matters which is important in other field
5. The type of analysis that gives the of sciences.
chemical identity of the species in the b. Our hypothesis can only be answered
sample. using the analytical method.
Qualitative Analysis c. Chemical analysis is interdisciplinary in
6. The quantitative method that uses nature making it a vital tool in medical,
potential, current, resistance and industrial, government, and academic
quantity of electrical charge. laboratories.
Electroanalytical Method 16. Which of the steps in the quantitative
7. The quantitative method that uses the method can be considered the source of
interaction between light and analyte large error?
atoms or molecules or the emission of Sampling
radiation by the analytes. 17. It is the process of collecting small
Spectroscopic Method amount of material whose composition
8. The quantitative method that determines represents the whole material.
the volume of a solution containing Sampling
sufficient reagent to react completely 18. Species that are also present in the
with the analyte. sample other than the analyte .
Volumetric Method Interferences
9. The quantitative method that determines 19. It is the step in quantitative analysis after
the mass of the analyte or compound converting the analyte in correct form .
chemically related to it. Removing interferences
Gravimetric Method 20. It improves the reliability of the results.
10. The toxic substance that was Replication
responsible for the death of the deer. 21. It is the process of determining the
Arsenic proportionality between the analyte
11. Which of the following was discovered concentration and the measured
during the exploration of planet Mars quantity.
using the Spirit Alpha X - ray Calibration
spectrometer ? 22. It is defined as the portions of a material
Carbonate & Silica of approximately the same size that are
12. Which of the following is/are carried through an analytical procedure
heterogenous sample? at the same time and in the same way.
Coal, Ocean, Soil, and Plant Tissue Replicates
13. These are the factors that are primarily 23. It refers to the components of sample
considered when choosing a method. that are determined.
Time, money, and resources. Analyte
, Module 2.1: Calculations Used in Analytical Chemistry
Self-Check Activity 2.1
1. Molar analytical concentration is the 17. In gravimetric analysis, we need enough
molar concentration (M) of a particular product to weigh accurately. Each tablet
species in a solution at equilibrium. provides-15 mg of iron. What is the mass
False (g) of Fe? How many tablets should we
2. 1 mole of S is 6.022x10 atoms of S. analyze to provide 0.25 g of Fe2O3
True product?
3. Parts per million is the unit used for Mass of Fe is 0.18 grams. We should
concentrated solutions. analyze 12 tablets.
False 18. Calculate the p - value for each of the
4. Mass and weight measurements are indicated ions in Cu2+, Zn2+, and NO3-
equivalent or the same at all times. in a solution that is 5.78 x 10^-2 M in
False Cu(NO3)2 and 0.204 M in Zn (NO3)2.
5. It is the SI unit for the amount of Express your answer in 3 decimal places
substance. .
Mole pCu = 1.238
6. the amount of a substance that contains pZn = 0.690
as many elementary entities as there are pNO3 = 0.281
atoms in exactly 12.00 grams of C-12.
Mole What is the mass in grams of 3.20 mol of
7. It is expressed as moles of solute per kg KBr?
of solvent . 380.79 grams
Molality 19. The reaction 5H₂C₂O4 + 2MnO-4 +
8. It is expressed as moles of solute per 6H+ —> 10CO₂ + 2Mn2+ + 8H₂O requires
liter of solution . 5 mol H₂C2O4 for 2 mol MnO-4. If you
Molarity mix 1.15 g Na2C2O4 ( FM 134.00 ) with
9. It is often used to express the 0.60 g KMnO4 ( FM 158.03 ) and excess
concentration of commercial aqueous aqueous acid, which reactant is limiting?
How much CO2 is produced? Express
reagents.
your answer in grams.
%w/w
10. Which of the following is the SI unit for The chemical name of the Limiting
volume ? reagent: Sodium Oxalate
microliter
11. Which of the following is equivalent to a The mass of the CO2 produced is 0.755
ppm? grams
microgram/mL 20. Exactly 750.0 mL of a solution that
12. The glassware used to prepare standard contained 480.4 ppm of Ba(NO3)2 were
solutions. mixed with 200.0 mL of a solution that
Volumetric flask was 0.03090 M in Al2(SO4)3.The
13. How do you convert 1 mole of water into chemical equation is 3Ba(NO3)2 +
grams? Al2(SO4)3 —> BaSO4 + 2 Al3+ + 6NO-3
multiply the mass by 18.0 g/mole
14. Find the number of millimoles of solute a. What mass of solid BaSO4 was
in 3.50 L of a solution that contains 3.33 formed? Give your answer in 3 decimal
ppm of CuSO4. place.
7.30x10^-2 mmol 0.320 grams
15. A 12.5o (w/w) NiCl2 (129.61 g/mol)
solution has a density of 1.149 g/mL b. What was the molar concentration of
Calculate the molar concentration of the unreacted reagent [Ala(SO4)3 or
NiCl2 in this solution. Ba(NO3)2]? Express your answer in
1.11 M scientific notation with two decimal
16. Find the number of millimoles of solute place, e.g. 2.56x10^-2
in 2.00 L of 0.0555 M KMnO4.
The chemical name of the unreacted
111 mmol
reagent is Aluminum Sulfate with
concentration of 6.02x10^-3 M.
Self-Check Activity 1.1
1. Absorbed water will not change the Amount of the sample
chemical composition of the sample. Nature of the sample
False Accuracy of the method
2. Reliability of experimental results are 14. What are the measurements usually
evaluated as the final step of quantitative needed for quantitative analysis?
analysis. Intensity of light of the analyte
True Mass or Volume of the sample
3. In selecting a method, the accuracy is Mass or Volume of the analyte
sometimes compromised with the 15. Why does the role analytical chemistry
available time and resources. important in many fields of sciences?
True a. Analytical chemistry is a branch of
4. The type of analysis that gives the chemistry that deals with quantification
amounts of species in the sample . and determination of the identity of
Quantitative Analysis matters which is important in other field
5. The type of analysis that gives the of sciences.
chemical identity of the species in the b. Our hypothesis can only be answered
sample. using the analytical method.
Qualitative Analysis c. Chemical analysis is interdisciplinary in
6. The quantitative method that uses nature making it a vital tool in medical,
potential, current, resistance and industrial, government, and academic
quantity of electrical charge. laboratories.
Electroanalytical Method 16. Which of the steps in the quantitative
7. The quantitative method that uses the method can be considered the source of
interaction between light and analyte large error?
atoms or molecules or the emission of Sampling
radiation by the analytes. 17. It is the process of collecting small
Spectroscopic Method amount of material whose composition
8. The quantitative method that determines represents the whole material.
the volume of a solution containing Sampling
sufficient reagent to react completely 18. Species that are also present in the
with the analyte. sample other than the analyte .
Volumetric Method Interferences
9. The quantitative method that determines 19. It is the step in quantitative analysis after
the mass of the analyte or compound converting the analyte in correct form .
chemically related to it. Removing interferences
Gravimetric Method 20. It improves the reliability of the results.
10. The toxic substance that was Replication
responsible for the death of the deer. 21. It is the process of determining the
Arsenic proportionality between the analyte
11. Which of the following was discovered concentration and the measured
during the exploration of planet Mars quantity.
using the Spirit Alpha X - ray Calibration
spectrometer ? 22. It is defined as the portions of a material
Carbonate & Silica of approximately the same size that are
12. Which of the following is/are carried through an analytical procedure
heterogenous sample? at the same time and in the same way.
Coal, Ocean, Soil, and Plant Tissue Replicates
13. These are the factors that are primarily 23. It refers to the components of sample
considered when choosing a method. that are determined.
Time, money, and resources. Analyte
, Module 2.1: Calculations Used in Analytical Chemistry
Self-Check Activity 2.1
1. Molar analytical concentration is the 17. In gravimetric analysis, we need enough
molar concentration (M) of a particular product to weigh accurately. Each tablet
species in a solution at equilibrium. provides-15 mg of iron. What is the mass
False (g) of Fe? How many tablets should we
2. 1 mole of S is 6.022x10 atoms of S. analyze to provide 0.25 g of Fe2O3
True product?
3. Parts per million is the unit used for Mass of Fe is 0.18 grams. We should
concentrated solutions. analyze 12 tablets.
False 18. Calculate the p - value for each of the
4. Mass and weight measurements are indicated ions in Cu2+, Zn2+, and NO3-
equivalent or the same at all times. in a solution that is 5.78 x 10^-2 M in
False Cu(NO3)2 and 0.204 M in Zn (NO3)2.
5. It is the SI unit for the amount of Express your answer in 3 decimal places
substance. .
Mole pCu = 1.238
6. the amount of a substance that contains pZn = 0.690
as many elementary entities as there are pNO3 = 0.281
atoms in exactly 12.00 grams of C-12.
Mole What is the mass in grams of 3.20 mol of
7. It is expressed as moles of solute per kg KBr?
of solvent . 380.79 grams
Molality 19. The reaction 5H₂C₂O4 + 2MnO-4 +
8. It is expressed as moles of solute per 6H+ —> 10CO₂ + 2Mn2+ + 8H₂O requires
liter of solution . 5 mol H₂C2O4 for 2 mol MnO-4. If you
Molarity mix 1.15 g Na2C2O4 ( FM 134.00 ) with
9. It is often used to express the 0.60 g KMnO4 ( FM 158.03 ) and excess
concentration of commercial aqueous aqueous acid, which reactant is limiting?
How much CO2 is produced? Express
reagents.
your answer in grams.
%w/w
10. Which of the following is the SI unit for The chemical name of the Limiting
volume ? reagent: Sodium Oxalate
microliter
11. Which of the following is equivalent to a The mass of the CO2 produced is 0.755
ppm? grams
microgram/mL 20. Exactly 750.0 mL of a solution that
12. The glassware used to prepare standard contained 480.4 ppm of Ba(NO3)2 were
solutions. mixed with 200.0 mL of a solution that
Volumetric flask was 0.03090 M in Al2(SO4)3.The
13. How do you convert 1 mole of water into chemical equation is 3Ba(NO3)2 +
grams? Al2(SO4)3 —> BaSO4 + 2 Al3+ + 6NO-3
multiply the mass by 18.0 g/mole
14. Find the number of millimoles of solute a. What mass of solid BaSO4 was
in 3.50 L of a solution that contains 3.33 formed? Give your answer in 3 decimal
ppm of CuSO4. place.
7.30x10^-2 mmol 0.320 grams
15. A 12.5o (w/w) NiCl2 (129.61 g/mol)
solution has a density of 1.149 g/mL b. What was the molar concentration of
Calculate the molar concentration of the unreacted reagent [Ala(SO4)3 or
NiCl2 in this solution. Ba(NO3)2]? Express your answer in
1.11 M scientific notation with two decimal
16. Find the number of millimoles of solute place, e.g. 2.56x10^-2
in 2.00 L of 0.0555 M KMnO4.
The chemical name of the unreacted
111 mmol
reagent is Aluminum Sulfate with
concentration of 6.02x10^-3 M.
