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WorksheetsVoltic Cell
Total questions: 11
Worksheet time: 11mins
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In a voltaic cell, electrodes used are copper (electrolyte: copper (II) sulphate solution) and zinc (electrolyte: zinc nitrate solution). What is the half-equation that occur at the copper electrode?
Cu --> Cu2+ + 2e
2H+ + 2e --> H2
Cu2+ + 2e --> Cu
In a voltaic cell, both the electrodes used are copper (electrolyte: copper (II) sulphate solution). Which of the following observation is correct.
copper electrode become thinner
gas bubbles released
the blue electrolyte turn to pale blue
the needle of voltmeter does not deflect
The energy change in voltaic cell is ______________.
kinetic energy --> electrical energy
electrical energy --> chemical energy
chemical energy --> electrical energy
electrical energy --> kinetic energy
A voltaic cell is producing the redox reaction below.
Mg(s) + Fe2+(aq) → Mg2+(aq) + Fe(s)
Which statement is correct when the cell produces electricity?
Magnesium atoms lose electrons.
Mass of the iron electrode decreases.
Electrons flow from the iron half-cell to the magnesium half-cell.
Negative ion flow from magnesium half-cell to iron half-cell.
