Question

A 5.3 × 10-2 M solution is to be used to prepare a series of five 100 mL solutions of varying concentration for use in creating a calibration curve for a spectrophotometric experiment. Determine the concentrations of each of the five dilutions if 10 mL aliquots of the current solution is used for V1.

Answer 1

solution 1

Initial solution , V1 = 10ml

Initial concentration,C1 = 0.053M

Final volume , V2 = 100ml

Final concentration , C2 = ?

C2 = C1 × V1/V2

= 0.053M × 10ml/100ml

= 0.0053M

= 5.3×10^-3M

solution 2

C2 = 0.0053M × 10ml/100ml

= 0.00053M

= 5.3 × 10^-4M

solution 3

C2 = 0.00053M × 10ml/100ml

= 0.000053M

= 5.3 × 10^-5M

solution 4

C2 = 0.000053M × 10ml/100ml

= 0.0000053M

= 5.3 × 10^-6M

solution 5

C2 = 0.0000053M × 10ml/100ml

= 0.00000053M

= 5.3×10^-7M