Copper sulphate solution \( (250 \mathrm{~mL}) \) was electrolysed using a platinum anode and a ...

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Copper sulphate solution \( (250 \mathrm{~mL}) \) was electrolysed using a platinum anode and a copper cathode. A constant current of \( 2 \mathrm{~mA} \) was passed for math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymn16/mn/math minutes. It was found that after electrolysis, the absorbance of the solution was reduced to \( 50 \% \) of its original value. Calculate the concentration of copper sulphate is the solution to begin with.
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