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Making Electricity

Making Electricity - Topic 10 Making Electricity...

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Topic 10 : Making Electricity electrons . Electricity passing along metal wires is a flow of In a cell/battery, electricity comes from a chemical reaction chemical energy electrical energy. Cells/batteries need replaced as the chemicals are being used up in the reaction to supply electricity. Some cells/batteries are rechargeable , e.g. nicad cells (nickel-cadmium cells) and the lead-acid battery used in cars/vans/buses.
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Dry Cells metal cap zinc case carbon rod (graphite) ammonium chloride The ammonium chloride in the cell is an example of an The purpose of the electrolyte is to electrolyte . complete the circuit .
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Electricity can be produced by connecting different metals together (with an electrolyte) to form a cell . Different pairs of metals connected in a cell give different voltages . This enables us to construct an V electrochemical series (see data booklet - page 7) Voltmeter. Two different metals. Electrolyte, e.g. sodium chloride solution.
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Displacement reactions. When a piece of magnesium metal is added to a solution of copper(II)sulphate, the blue colour of the solution fades and the magnesium is covered with a brown solid. magnesium copper(II)sulphate solution
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Displacement reactions. When a piece of magnesium metal is added to a solution of copper(II)sulphate, the blue colour of the solution fades and the magnesium is covered with a brown solid.
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