Chemical Kinetics and Equilibrium Quiz2

What is a common misconception about electrolytic refining?

• It always results in 100% pure metal

• It can be used to extract any metal from its ore

• It is a simple process that only involves passing current through a metal solution

• It is only used for a few specific metals

What is a misconception related to electroplating?

• It is the same as painting or coating a metal surface

• It always results in a smooth and uniform coating

• It is a simple process that anyone can do at home

• It can be used to change the properties of a metal permanently

At which level can teachers introduce real-world examples of industrial applications of electrochemistry?

• Symbolic Level

• All of the above

• Micro Level (Particle Interactions and Mechanisms)

• Macro Level (Observations and Phenomena)

What is a common misconception about irreversible reactions?

• Irreversible reactions are always fast, reversible reactions are slow

• Irreversible reactions are difficult to reverse

• Reversible reactions are always endothermic

• Irreversible reactions are always exothermic

What is the key difference between irreversible and reversible reactions?

• Irreversible reactions always result in 100% pure products

• Irreversible reactions proceed in one direction only, while reversible reactions can establish an equilibrium state

• Irreversible reactions are always exothermic, while reversible reactions are always endothermic

• Irreversible reactions are slow, while reversible reactions are fast

What is a common misconception about rates of reaction?

• Increasing the concentration of reactants always speeds up a reaction

• Temperature affects the rate of a reaction by changing the amount of reactants used up

• The size of reactant particles does not affect the rate of a reaction

• Adding a catalyst decreases the amount of product formed in a reaction

What does a large equilibrium constant indicate?

• The reaction is irreversible

• The reaction proceeds slowly

• The reaction has stopped

• The reaction favors products at equilibrium

What is the equilibrium constant a reflection of?

• The temperature of the reaction

• The initial concentrations of reactants

• The extent of a reaction at equilibrium

• The speed at which equilibrium is reached

What is a common misconception about the equilibrium constant?

• Changing the initial concentrations of reactants will alter the value of the equilibrium constant

• Equilibrium constants for reverse reactions are reciprocals of each other

• A large equilibrium constant indicates a slow reaction

• The equilibrium constant provides information on the extent to which a reaction has proceeded

What can teachers use to illustrate the concept of equilibrium at the macro level?

• Visual demonstrations

• Equilibrium constant expressions

• Particle diagrams

• Rate law equations