Five standard chromium(VI) solutions were prepared through serial dilution technique with corresponding absorbance readings at 540 nm wavelength as follows:Concentration AbsorbanceA1=0.650 C1=1.9 ppmA2=0.712 C2=4.0 ppmA3=1.370 C3=6.0 ppmA4=2.050 C4=8.0 ppmA5=3.423 C5=10.0 ppmThe sample solution gives an average absorbance reading of 0.713. What is then the concentration of chromium (VI) ion in the sample?

Five standard chromium(VI) solutions were prepared through serial dilution technique with corresponding absorbance readings at 540 nm wavelength as follows:Concentration AbsorbanceA1=0.650 C1=1.9 ppmA2=0.712 C2=4.0 ppmA3=1.370 C3=6.0 ppmA4=2.050 C4=8.0 ppmA5=3.423 C5=10.0 ppmThe sample solution gives an average absorbance reading of 0.713. What is then the concentration of chromium (VI) ion in the sample?

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