Chem Lab 122 Multiple Choice 2025/2026
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problems. This is especially important in subjects like proof-based mathematics.Calculation and Accuracy: Mathematical exams test a student’s ability to perform accurate
calculations and apply mathematical principles in the correct sequence to reach a solution.Understanding of Concepts: Beyond solving problems, mathematics exams test
students’ conceptual understanding of core topics, such as algebra, geometry, calc
What is a "cooling curve?" - Answer The change in temperature of a
substance showing where that substance's melting/freezing point is
What do you determine experimentally with the help of the "cooling curve" in
the second experiment? - Answer The solvent's freezing point when it is
pure and when a solute is dissolved in it.
What is the phenomenon of "Freezing point depression?" Include the relevant
equation and define terms involved in it. - Answer Freezing
point depression is the lowering of a solvent and freezing point due to it
continuing some concentration of solute in it. The amount of change in
freezing point is calculated by Delta T-Kf*m, where Delta T is change of
freezing point in Celsius, Kf is a solvent's freezing point constant, and m is the
molality of the solution.
Calculate the freezing point of a solution containing 2.65g of biphenyl
(C12H10) dissolved in 100g of cyclohexane if the normal freezing point of
cyclohexane is 6.6 degrees Celsius. - Answer 1. Convert grams to
moles
2. Find the molality
3. Solve for Delta T Ans= 3.1 C
, What is the function of an antacid? - Answer To neutralize excess stomach
acid in the body. It is typically made up of either a base or an enzyme
blocker to prevent the production of more stomach acid.
problems. This is especially important in subjects like proof-based mathematics.Calculation and Accuracy: Mathematical exams test a student’s ability to perform accurate
calculations and apply mathematical principles in the correct sequence to reach a solution.Understanding of Concepts: Beyond solving problems, mathematics exams test
students’ conceptual understanding of core topics, such as algebra, geometry, calc
List "four common active ingredients" found in antacids. - Answer -
CaCO3
-Mg(OH)2
-Al(OH)3
-NaHCO3
What is the main analytical technique used in this experiment to measure the
effectiveness of the antacid? - Answer A back titration
What do you measure analytically in the experiment? - Answer How
much acid was left un-neutralized by the antacid. This amount is
subtracted from the original amount to determine how much acid was
neutralized by the antacid.
Why is it important to reweigh the tablet after crushing it? - Answer
Some of the material from the tablet may have been lost during the grinding
process, so it's important to ensure you do not overstate how much antacid
was used for the neutralization.
Name four factors that affects the rate of the reaction - Answer
1.
Temperature
Latest Questions & Answers 100% Accurate
Solutions For Guaranteed Success | Expert-
Verified, Graded A+
problems. This is especially important in subjects like proof-based mathematics.Calculation and Accuracy: Mathematical exams test a student’s ability to perform accurate
calculations and apply mathematical principles in the correct sequence to reach a solution.Understanding of Concepts: Beyond solving problems, mathematics exams test
students’ conceptual understanding of core topics, such as algebra, geometry, calc
What is a "cooling curve?" - Answer The change in temperature of a
substance showing where that substance's melting/freezing point is
What do you determine experimentally with the help of the "cooling curve" in
the second experiment? - Answer The solvent's freezing point when it is
pure and when a solute is dissolved in it.
What is the phenomenon of "Freezing point depression?" Include the relevant
equation and define terms involved in it. - Answer Freezing
point depression is the lowering of a solvent and freezing point due to it
continuing some concentration of solute in it. The amount of change in
freezing point is calculated by Delta T-Kf*m, where Delta T is change of
freezing point in Celsius, Kf is a solvent's freezing point constant, and m is the
molality of the solution.
Calculate the freezing point of a solution containing 2.65g of biphenyl
(C12H10) dissolved in 100g of cyclohexane if the normal freezing point of
cyclohexane is 6.6 degrees Celsius. - Answer 1. Convert grams to
moles
2. Find the molality
3. Solve for Delta T Ans= 3.1 C
, What is the function of an antacid? - Answer To neutralize excess stomach
acid in the body. It is typically made up of either a base or an enzyme
blocker to prevent the production of more stomach acid.
problems. This is especially important in subjects like proof-based mathematics.Calculation and Accuracy: Mathematical exams test a student’s ability to perform accurate
calculations and apply mathematical principles in the correct sequence to reach a solution.Understanding of Concepts: Beyond solving problems, mathematics exams test
students’ conceptual understanding of core topics, such as algebra, geometry, calc
List "four common active ingredients" found in antacids. - Answer -
CaCO3
-Mg(OH)2
-Al(OH)3
-NaHCO3
What is the main analytical technique used in this experiment to measure the
effectiveness of the antacid? - Answer A back titration
What do you measure analytically in the experiment? - Answer How
much acid was left un-neutralized by the antacid. This amount is
subtracted from the original amount to determine how much acid was
neutralized by the antacid.
Why is it important to reweigh the tablet after crushing it? - Answer
Some of the material from the tablet may have been lost during the grinding
process, so it's important to ensure you do not overstate how much antacid
was used for the neutralization.
Name four factors that affects the rate of the reaction - Answer
1.
Temperature
