The Effects of Current and Potential on Rate and Equilibrium (Grade 12 NSC Matric Physical Sciences): Quizzes
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10 questions from this quiz
How does increasing current affect the rate of reaction in an electrochemical cell?
How does increasing current affect the rate of reaction in an electrochemical cell?
It increases the reaction rate
What process occurs at the zinc electrode in a zinc-copper galvanic cell?
What process occurs at the zinc electrode in a zinc-copper galvanic cell?
Oxidation
What happens at the copper electrode in a zinc-copper galvanic cell?
What happens at the copper electrode in a zinc-copper galvanic cell?
Reduction of ions
In a galvanic cell, which electrode has an excess of electrons?
In a galvanic cell, which electrode has an excess of electrons?
The anode (zinc electrode)
What effect does increasing applied current have in an electrolytic cell?
What effect does increasing applied current have in an electrolytic cell?
Increases rate of decomposition
What is the potential difference across a galvanic cell when it reaches equilibrium?
What is the potential difference across a galvanic cell when it reaches equilibrium?
Zero
What happens to reactant and product concentrations when a galvanic cell reaches equilibrium?
What happens to reactant and product concentrations when a galvanic cell reaches equilibrium?
They become constant
What is the current in a galvanic cell at equilibrium?
What is the current in a galvanic cell at equilibrium?
Zero
What does a larger potential difference in a galvanic cell indicate?
What does a larger potential difference in a galvanic cell indicate?
Reaction is further from equilibrium
If current in a galvanic cell doubles, what happens to the reaction rate?
If current in a galvanic cell doubles, what happens to the reaction rate?
It doubles