CHEM 103 Lab Exam | Verified Exam Questions and Answers | Latest
Updated Study Material 2026
Question:
The of a chemical reaction refers to the rate of the reaction.
Answer:
kinetics
Question:
List the four factors that control kinetics of a chemical reaction.
Answer:
The nature of the reaction itself, the concentration of the reactants, the temperature, and the presence of a
catalysts
Question:
What color is the permanganate?
Answer:
purple
Question:
What color is the oxalate solution?
Answer:
colorless
Question:
What color change do you see in the rate of reaction lab when monitoring the chemical reaction between
the oxalate and permanganate?
Answer:
The color will change from a purple and fade to pink, which will fade to a peach-orange, which will fade
to a pale yellow, which will fade to colorless
Question:
What happens to the reaction rate when you reduce the amount of the reactants?
Answer:
The reaction will be slower than the normal reaction because there will be less collisions occurring,
causing the amount of successful collisions to be less and the reaction rate to be less
, Question:
What happens to the reaction rate when you increase the temperature of a reaction?
Answer:
The number of collisions happening in the reaction increases and the amount of kinetic energy increases,
causing the rate of the reaction to be faster
Question:
What happens to the reaction rate when you use a catalyst?
Answer:
The catalyst lowers the energy needed for activation, causing the rate of the reaction to be faster.
Question:
What is a catalyst?
Answer:
chemicals that increase the rate of a reaction, but are not used up or changed by the reaction
Question:
What is the oxidation state of copper in the compound CuCl?
Answer:
Cu+
Question:
What is the oxidation state of copper in the compound CuCl2
Answer:
Cu 2+
Question:
What is the role of sodium sulfite (Na2SO3) in the reaction to produce CuCl from CuCl2 and Na2SO3?
Answer:
Sodium sulfite is the reducing agent in this reaction
Question:
The amount of product you expect to get in a reaction
Answer:
theoretical yield
Updated Study Material 2026
Question:
The of a chemical reaction refers to the rate of the reaction.
Answer:
kinetics
Question:
List the four factors that control kinetics of a chemical reaction.
Answer:
The nature of the reaction itself, the concentration of the reactants, the temperature, and the presence of a
catalysts
Question:
What color is the permanganate?
Answer:
purple
Question:
What color is the oxalate solution?
Answer:
colorless
Question:
What color change do you see in the rate of reaction lab when monitoring the chemical reaction between
the oxalate and permanganate?
Answer:
The color will change from a purple and fade to pink, which will fade to a peach-orange, which will fade
to a pale yellow, which will fade to colorless
Question:
What happens to the reaction rate when you reduce the amount of the reactants?
Answer:
The reaction will be slower than the normal reaction because there will be less collisions occurring,
causing the amount of successful collisions to be less and the reaction rate to be less
, Question:
What happens to the reaction rate when you increase the temperature of a reaction?
Answer:
The number of collisions happening in the reaction increases and the amount of kinetic energy increases,
causing the rate of the reaction to be faster
Question:
What happens to the reaction rate when you use a catalyst?
Answer:
The catalyst lowers the energy needed for activation, causing the rate of the reaction to be faster.
Question:
What is a catalyst?
Answer:
chemicals that increase the rate of a reaction, but are not used up or changed by the reaction
Question:
What is the oxidation state of copper in the compound CuCl?
Answer:
Cu+
Question:
What is the oxidation state of copper in the compound CuCl2
Answer:
Cu 2+
Question:
What is the role of sodium sulfite (Na2SO3) in the reaction to produce CuCl from CuCl2 and Na2SO3?
Answer:
Sodium sulfite is the reducing agent in this reaction
Question:
The amount of product you expect to get in a reaction
Answer:
theoretical yield
