You have 20 ml of 10% Bromophenol Blue (BPB). Using a 10% stock, how would you prepare 5 ml of a 0.2 % stock? (MW BPB is 670) Assume 1 % = 1 g/100ml.
In addition, what is the molarity of the 0.2% BPB Stock?© BrainMass Inc. brainmass.com October 16, 2018, 7:22 pm ad1c9bdddf
Mass of Bromophenol present in 20 ml of 10% stock = 0.1*20 = 2 g
We need to dilute ...
This solution contains step-by-step calculations to determine the molarity of the 0.2% bromophenol blue stock by determining the mass of BPB present and amount needed for dilution.