1. If the molar extinction coefficient () of a compound is 2.5 x 10 5 mol -1 lcm -1 at 528 nm and the Abs (at 528 nm) = 0.254 find the concentration of that solution. (assume a path length of 1.0 cm) 2. If a student measures a sample that gives an Abs = 1.85 at the max

1. If the molar extinction coefficient (ε) of a compound is 2.5 x 10 ⁵ mol ^-1 lcm ^-1 at 528 nm and the Abs (at 528 nm) = 0.254 find the concentration of that solution. (assume a path length of 1.0 cm)

2. If a student measures a sample that gives an Abs = 1.85 at the λ _max , is this data reliable? If not, then what might they do to improve their data?

3. If your stock solution has a concentration of 0.75 M and you want to make 250 mL of a solution that has a concentration of 4.8 x 10 ^-2 M, how much stock solution will you need?

Expert Answer

1. Absorbance = molar extinction coefficient x path length x concent View the full answer