Plug the 12 VCD adapter into the power supply socket.Press the button "R"
so that the absorbance value is 0.00 and transmittance value is 100%. 3. Remove the cuvette containing the reference sample and place another cuvette
containing the CuSO4 solution of known concentration into the colorimeter. Press the
button "T" and record the value of absorbance displayed on the LCD screen in the
Table 1.Plot a graph of absorbance (Y-axis) versus the concentration of CuSO4 solution (X-
axis).Mark the aborbance value of solution X on the X-axis and draw a horizontal line which
meets the calibration curve.2.4.5.6.7.