138. Solving a chemistry problem

138. Solving a chemistry problem

OPTION 3
A weighed portion of cyclohexanone weighing m (g) was placed in flasks with a capacity of 50.0 ml and brought to the mark with cyclohexane. Standard solutions were photometrically measured at 1718 cm-1 with respect to pure cyclohexane and the following data were obtained:
m, g 0.00625 0.125 0.250 0.500 1.000
A 0.060 0.085 0.140 0.255 0.480
The volume V (ml) of the test mixture was diluted with cyclohexane in a flask with a capacity of 250.0 ml, and the resulting solution was photometric under the same conditions. Determine the concentration (g / 100 ml) of cielohexanone in the analyzed solution if A2 and V2 are 1) 0.345; 100.0 ml 2) 0.070; 10.0 ml 3) 0.160; 50.0 ml 4) 0.258; 100.0 ml.