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Question
Which of the following metals should be chosen to react with CuSO4 solution to make its color disappear?
Which of the following metals should be chosen to react with CuSO4 solution to make its color disappear?
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Solution
The correct option is A Iron (Fe)
CuSO4 solution is blue in color due to the presence of copper (Cu). To make this color go away, Cu should be displaced from this solution.
We know that to displace a metal (in this case, copper (Cu)) from its salt solution (CuSO4), we need a metal which is more reactive than Cu. Gold and lead are less reactive than copper and cannot displace it. Iron (Fe) on the other hand is more reactive than Cu and hence can displace Cu from its salt solution to form ferrous sulphate which is not blue anymore.
Iron (Fe)
CuSO4 solution is blue in color due to the presence of copper (Cu). To make this color go away, Cu should be displaced from this solution.
We know that to displace a metal (in this case, copper (Cu)) from its salt solution (CuSO4), we need a metal which is more reactive than Cu. Gold and lead are less reactive than copper and cannot displace it. Iron (Fe) on the other hand is more reactive than Cu and hence can displace Cu from its salt solution to form ferrous sulphate which is not blue anymore.
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