Calculating the Rate of Reaction Flashcards
(26 cards)
What is the rate of reaction?
The rate of reaction is the speed at which reactants are converted into products in a chemical reaction.
True or False: The rate of reaction can be affected by temperature.
True
Fill in the blank: The rate of reaction can be expressed as the change in concentration of a reactant or product per unit of _____.
time
What is the formula for calculating the rate of reaction?
Rate = Δ[concentration] / Δ[time]
Which factor does NOT affect the rate of reaction?
The color of the reactants
What happens to the rate of reaction when the concentration of reactants increases?
The rate of reaction generally increases.
Multiple choice: Which of the following factors can increase the rate of reaction? A) Temperature B) Surface area C) Catalysts D) All of the above
D) All of the above
True or False: A catalyst is consumed in a chemical reaction.
False
What is the role of a catalyst in a reaction?
A catalyst increases the rate of reaction without being consumed.
Fill in the blank: In a reaction, increasing the _____ can lead to more effective collisions between molecules.
temperature
What does the term ‘activation energy’ refer to?
Activation energy is the minimum energy required for a reaction to occur.
True or False: Increasing the surface area of solid reactants can slow down the rate of reaction.
False
What is the effect of pressure on the rate of reaction for gases?
Increasing pressure generally increases the rate of reaction by decreasing the volume available for gas molecules.
Multiple choice: Which of the following is a unit for rate of reaction? A) mol/L B) s^-1 C) m/s D) All of the above
B) s^-1
What is meant by ‘reaction mechanism’?
A reaction mechanism is the step-by-step sequence of elementary reactions by which overall chemical change occurs.
Fill in the blank: The _____ law states that the rate of reaction is proportional to the concentration of reactants raised to their respective powers.
rate
True or False: A higher temperature always leads to a faster reaction rate.
True
What is the purpose of measuring the rate of reaction?
To understand how fast a reaction occurs and to optimize conditions for desired outcomes.
Multiple choice: Which of the following is a method to measure the rate of reaction? A) Measuring gas volume B) Monitoring color change C) Conductivity changes D) All of the above
D) All of the above
What is the effect of temperature on the kinetic energy of molecules?
Increasing temperature increases the kinetic energy of molecules.
Fill in the blank: The _____ theory explains how molecules collide with enough energy to react.
collision
True or False: The presence of a catalyst lowers the activation energy of a reaction.
True
What is an example of a factor that can decrease the rate of reaction?
Decreasing the temperature.
Multiple choice: Which of the following reactions would likely have a slower rate? A) Combustion B) Rusting of iron C) Explosions D) Photosynthesis
B) Rusting of iron
