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When comparing voltaic cells to electrolytic cells, oxidation occurs at the*
Which statement describes the reactions in an electrochemical cell?*
Which reaction occurs at the anode in an electrochemical cell?*
Which change occurs at the anode in an operating electrochemical cell?*
Which reaction occurs at the anode of an electrochemical cell?*
An electrolytic cell differs from a voltaic cell because an electrolytic cell*
Where do reduction and oxidation occur in an electrolytic cell?*
In an operating voltaic cell, reduction occurs*
At which electrode does oxidation occur in a voltaic cell and in an electrolytic cell?*
Which term identifies the half-reaction that occurs at the anode of an operating electro- chemical cell?*
Base your answers to questions 11 on the information below and on your knowledge of chemistry.
An operating voltaic cell has magnesium and silver electrodes. The cell and the ionic equation representing the reaction that occurs in the cell are shown below.
Explain, in terms of electrical energy, how electrolysis reactions differ from voltaic cell reactions.*
Base your answers to questions 12 on the information below and on your knowledge of chemistry.
A student constructs an electrochemical cell. A diagram of the operating cell and the unbalanced ionic equation representing the reaction occurring in the cell are shown below.
The blue color of the solution in the copper half-cell indicates the presence of Cu2+ ions. The student observes that the blue color becomes less intense as the cell operates.
Identify the type of electrochemical cell represented by the diagram.*
Base your answers to questions 13 on the information below and on your knowledge of chemistry.
The diagram and ionic equation below represent an operating voltaic cell.
State the purpose of the salt bridge in completing the circuit in this cell.*
Base your answers to questions 14 on the information below and on your knowledge of chemistry.
A student sets up a voltaic cell using magnesium and zinc electrodes. The porous barrier in the cell has the same purpose as a salt bridge. The diagram and the ionic equation below represent this operating cell.
State, in terms of the relative activity of metals, why the reaction in this cell occurs.*
Base your answers to questions 15 on the information below and on your knowledge of chemistry.
A student constructs an electrochemical cell during a laboratory investigation. When the switch is closed, electrons flow through the external circuit. The diagram and ionic equation below represent this cell and the reaction that occurs.
State what happens to the mass of the Cu electrode and the mass of the Zn electrode in the operating cell.*