The absorbance of the 214 mm solution of nickel(ii) chloride can be obtained by fitting it into the regression line of the calibration curve.
During measurements of the concentration of a solution using a spectrophotometer, it is conventional to first calibrate the instrument. The calibration is done by measuring the absorbance of various concentrations of the test solution after measuring the absorbance of the sample blank.
After the instrument has been calibrated, the absorbance of any test solution can now be obtained by fitting it into the regression line of the calibration curve.
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