Reference no: EM132508726

1. In a titration, we use KOH to titrate a weak acid HA. Ve is the equivalence point and Vb is base added during the titration.

(1) For Vb, at what fraction of Ve does pH = pKa -1?

(2) For Vb, at what fraction Ve does pH = pKa + 1?

(3) Utilize these two points as well as Vb = 0, 1/2 Ve, Ve, and 1.2 Ve to draw the titration curve for the reaction of 100 mL of 0.100 M anilinium bromide with 0.100 M KOH (For anilinium ion, pKa = 4.60). (15 pts)

2. In the EDTA titration, we have an EDTA solution 50.0 mL at 0.0400 M, and this EDTA solution is titrated with 0.0800 M CuCl2 at pH 5.00. Find the pCu2+ when you add this CuCl2 solution at 0.1, 5.0, 10.0, 20.0, 24.0, 25.0, 26.0 and 30.0 mL.