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1. a) Chemical cells produce a voltage - Edexcel - GCSE Chemistry - Question 1 - 2022 - Paper 1
Question 1
1. a) Chemical cells produce a voltage. A chemical cell can be made by placing the metals copper and zinc in a beaker of sodium chloride solution. Figure 1 shows a... show full transcript
Worked Solution & Example Answer:1. a) Chemical cells produce a voltage - Edexcel - GCSE Chemistry - Question 1 - 2022 - Paper 1
Step 1
Describe what will happen to the brightness of the light bulb over a long period of time.
Answer
Over a long period of time, the brightness of the light bulb will decrease. This is because as the chemical reaction occurs between the copper and zinc in the sodium chloride solution, the reactants will gradually be depleted. As the concentration of ions decreases, there will be fewer electrons available to flow through the circuit, which will ultimately lead to a reduction in brightness.
Step 2
Step 3
Draw a labelled diagram in the box to show the arrangement of copper and zinc atoms in this alloy.
Answer
In the diagram, depict a circle to represent the size of a copper atom and slightly larger circles around it to represent zinc atoms. Label the circles appropriately as 'Copper Atom' and 'Zinc Atom'. Show the arrangement of these atoms in close proximity to illustrate how they form an alloy.