UNE CHEM 1011 LAB FINAL: COMPREHENSIVE
PRACTICE EXAMINATION STUDY GUIDE | LATEST
UPDATE 2026/2027 | ACTUAL EXAM PRACTICE
QUESTIONS AND ANSWERS | EXAM REVIEW | 100%
CORRECT ANSWERS | VERIFIED SOLUTIONS
This practice examination is designed for candidates preparing for the
UNE CHEM 1011 Laboratory Final, a rigorous assessment of
foundational and advanced chemistry laboratory techniques, theoretical
principles, and data analysis. It covers essential topics including
chemical safety, quantitative analysis, spectroscopy, chromatography,
thermodynamics, kinetics, and equilibrium. The questions reflect the
depth and complexity expected in a university-level general chemistry
lab course, emphasizing critical thinking, problem-solving, and the
application of theoretical knowledge to practical laboratory scenarios.
This resource is intended to help students assess their readiness, identify
areas for further study, and build confidence for the actual final
examination.
Table of Contents
1. Laboratory Safety and Chemical Hygiene
2. Quantitative Analysis and Gravimetric Methods
3. Titrimetric Analysis and Acid-Base Chemistry
4. Spectroscopy and Spectrophotometry
5. Chromatography and Separation Techniques
6. Thermodynamics and Calorimetry
7. Chemical Kinetics and Reaction Rates
, 8. Equilibrium and Le Chatelier's Principle
9. Electrochemistry and Redox Titrations
10. Data Analysis, Error Propagation, and Reporting
Page 1
1. In the context of a quantitative transfer procedure for a
gravimetric analysis, which of the following actions is most critical
to ensure the accuracy of the final result?
A) Using a stirring rod to transfer the precipitate from the beaker
to the filter paper.
B) Rinsing the beaker with distilled water and adding the rinse to
the filter funnel.
C) Allowing the precipitate to air dry for 24 hours before weighing.
D) Using a rubber policeman to remove any precipitate adhering
to the stirring rod and beaker walls, and quantitatively transferring
all solid material.
Correct Answer: D
A quantitative transfer requires that all of the analyte be transferred
from the reaction vessel to the filter or container for weighing. Using a
rubber policeman to physically dislodge and wash all precipitate ensures
no analyte is lost. Option A is a step, but D is more comprehensive. Air
drying (C) introduces error from moisture and is not standard practice
for accurate gravimetry. Rinsing alone (B) is insufficient to remove all
solid particles.
2. A student performs a spectrophotometric analysis to determine
the concentration of an unknown copper(II) sulfate solution. They
, prepare a calibration curve of absorbance versus concentration
and find the best-fit line equation to be y = 1.25x + 0.015, with an
R² value of 0.998. The unknown solution has an absorbance of
0.785. What is the concentration of the unknown solution?
A) 0.616 M
B) 0.628 M
C) 0.640 M
D) 0.600 M
Correct Answer: A
To find the concentration (x), rearrange the line equation: x = (y - 0.015)
/ 1.25 = (0.785 - 0.015) / 1.25 = 0..25 = 0.616 M. Option B results
from a subtraction error, C from not including the intercept, and D from
an incorrect rearrangement of the equation.
3. In a lab experiment, a student accidentally spills a concentrated
solution of hydrochloric acid on their lab bench. According to
proper chemical hygiene protocols, what is the first action the
student should take?
A) Immediately neutralize the acid spill with sodium bicarbonate.
B) Alert the laboratory instructor and all other personnel in the
vicinity of the spill.
C) Use a spill kit to contain and absorb the acid.
D) Wipe the acid off the bench with a paper towel and dispose of
it in the regular trash.
Correct Answer: B
The immediate priority in any chemical spill is to alert the instructor and
others to ensure safety and receive proper instructions for containment
and cleanup. Attempting to neutralize (A) or clean up (C) without proper
, guidance can be dangerous. Option D is highly unsafe and incorrect. The
first step is always to notify the authority in charge.
4. During a fractional distillation of a mixture of two miscible liquids,
the temperature on the thermometer at the distillation head is
observed to plateau at 78°C for a significant period before rising
again. Based on this observation, which conclusion is most valid?
A) The distillate being collected during this plateau is primarily the
first liquid, which has a higher boiling point.
B) The heat source is insufficient and the distillation should be
stopped.
C) The distillate being collected during this plateau is primarily the
first liquid, which has a lower boiling point.
D) The apparatus has a leak, and the pressure is affecting the
boiling point.
Correct Answer: C
In a fractional distillation, the first plateau in temperature corresponds
to the distillation of the component with the lower boiling point. At
78°C, the liquid distilling is the lower-boiling component. Option A is
incorrect because the lower boiling point liquid distills first. B and D are
not supported by the observation of a steady plateau.
5. A student is tasked with preparing a 0.100 M standard solution of
sodium hydroxide (NaOH). The student weighs out 4.00 g of NaOH
pellets and dissolves them in distilled water to make a final
volume of 1.00 L. Which of the following statements best
describes the prepared solution?
A) The solution is exactly 0.100 M because the mass and volume
are correct.
PRACTICE EXAMINATION STUDY GUIDE | LATEST
UPDATE 2026/2027 | ACTUAL EXAM PRACTICE
QUESTIONS AND ANSWERS | EXAM REVIEW | 100%
CORRECT ANSWERS | VERIFIED SOLUTIONS
This practice examination is designed for candidates preparing for the
UNE CHEM 1011 Laboratory Final, a rigorous assessment of
foundational and advanced chemistry laboratory techniques, theoretical
principles, and data analysis. It covers essential topics including
chemical safety, quantitative analysis, spectroscopy, chromatography,
thermodynamics, kinetics, and equilibrium. The questions reflect the
depth and complexity expected in a university-level general chemistry
lab course, emphasizing critical thinking, problem-solving, and the
application of theoretical knowledge to practical laboratory scenarios.
This resource is intended to help students assess their readiness, identify
areas for further study, and build confidence for the actual final
examination.
Table of Contents
1. Laboratory Safety and Chemical Hygiene
2. Quantitative Analysis and Gravimetric Methods
3. Titrimetric Analysis and Acid-Base Chemistry
4. Spectroscopy and Spectrophotometry
5. Chromatography and Separation Techniques
6. Thermodynamics and Calorimetry
7. Chemical Kinetics and Reaction Rates
, 8. Equilibrium and Le Chatelier's Principle
9. Electrochemistry and Redox Titrations
10. Data Analysis, Error Propagation, and Reporting
Page 1
1. In the context of a quantitative transfer procedure for a
gravimetric analysis, which of the following actions is most critical
to ensure the accuracy of the final result?
A) Using a stirring rod to transfer the precipitate from the beaker
to the filter paper.
B) Rinsing the beaker with distilled water and adding the rinse to
the filter funnel.
C) Allowing the precipitate to air dry for 24 hours before weighing.
D) Using a rubber policeman to remove any precipitate adhering
to the stirring rod and beaker walls, and quantitatively transferring
all solid material.
Correct Answer: D
A quantitative transfer requires that all of the analyte be transferred
from the reaction vessel to the filter or container for weighing. Using a
rubber policeman to physically dislodge and wash all precipitate ensures
no analyte is lost. Option A is a step, but D is more comprehensive. Air
drying (C) introduces error from moisture and is not standard practice
for accurate gravimetry. Rinsing alone (B) is insufficient to remove all
solid particles.
2. A student performs a spectrophotometric analysis to determine
the concentration of an unknown copper(II) sulfate solution. They
, prepare a calibration curve of absorbance versus concentration
and find the best-fit line equation to be y = 1.25x + 0.015, with an
R² value of 0.998. The unknown solution has an absorbance of
0.785. What is the concentration of the unknown solution?
A) 0.616 M
B) 0.628 M
C) 0.640 M
D) 0.600 M
Correct Answer: A
To find the concentration (x), rearrange the line equation: x = (y - 0.015)
/ 1.25 = (0.785 - 0.015) / 1.25 = 0..25 = 0.616 M. Option B results
from a subtraction error, C from not including the intercept, and D from
an incorrect rearrangement of the equation.
3. In a lab experiment, a student accidentally spills a concentrated
solution of hydrochloric acid on their lab bench. According to
proper chemical hygiene protocols, what is the first action the
student should take?
A) Immediately neutralize the acid spill with sodium bicarbonate.
B) Alert the laboratory instructor and all other personnel in the
vicinity of the spill.
C) Use a spill kit to contain and absorb the acid.
D) Wipe the acid off the bench with a paper towel and dispose of
it in the regular trash.
Correct Answer: B
The immediate priority in any chemical spill is to alert the instructor and
others to ensure safety and receive proper instructions for containment
and cleanup. Attempting to neutralize (A) or clean up (C) without proper
, guidance can be dangerous. Option D is highly unsafe and incorrect. The
first step is always to notify the authority in charge.
4. During a fractional distillation of a mixture of two miscible liquids,
the temperature on the thermometer at the distillation head is
observed to plateau at 78°C for a significant period before rising
again. Based on this observation, which conclusion is most valid?
A) The distillate being collected during this plateau is primarily the
first liquid, which has a higher boiling point.
B) The heat source is insufficient and the distillation should be
stopped.
C) The distillate being collected during this plateau is primarily the
first liquid, which has a lower boiling point.
D) The apparatus has a leak, and the pressure is affecting the
boiling point.
Correct Answer: C
In a fractional distillation, the first plateau in temperature corresponds
to the distillation of the component with the lower boiling point. At
78°C, the liquid distilling is the lower-boiling component. Option A is
incorrect because the lower boiling point liquid distills first. B and D are
not supported by the observation of a steady plateau.
5. A student is tasked with preparing a 0.100 M standard solution of
sodium hydroxide (NaOH). The student weighs out 4.00 g of NaOH
pellets and dissolves them in distilled water to make a final
volume of 1.00 L. Which of the following statements best
describes the prepared solution?
A) The solution is exactly 0.100 M because the mass and volume
are correct.
