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Explain Why The Actual Yield Was Greater Than 100 % Yield

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The % yield was greater than 100% because the actual yield was greater than the theoretical yield. One error that may have caused this result to occur was that the copper may have not completely dried over the time it was left. If water was still inside the copper, it would increase the mass of the actual yield. If the copper was left in the beaker to dry for a longer time, it would help decrease the mass of the copper (as the water would be completely dried out) and bring the actual yield down. Another error that may have caused these results was that the piece of Aluminum was heated for longer than it should have been. If the piece of Aluminum was heated for longer, it would start to change and turn into a black colour. This would mean

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