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Molarity of Bromophenol Blue Stock

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?

Solution Preview

Mass of Bromophenol present in 20 ml of 10% stock = 0.1*20 = 2 g

We need to dilute ...

Solution Summary

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.