2 ml volume for dilution was used.

Since a dilution was made to the face wash sample prior to measurement, back calculate the salicylic acid concentration in mg in the original face wash sample assuming the bottle size is 125 mL (mg/bottle). Show one sample calculation for replicate sample #1. my concentration for unknown was 42.87 and absorbance was 0.578 10. Since a dilution was made to the face wash sample prior to measurement, back calculate the salicylic acid concentration in mg in the original face wash sample assuming the bottle size is 125 ml (mg/bottle). Show one sample calculation for replicate sample #1. Record your calculated results in the same table as step 9 - report