Tris (hydroxymethyl) aminomethane, commonly known as Tris, is a weak base that is often used as a buffer in biochemistry. Tris-H+ + H2O ?Tris+ H_3 O^+ pK_a=8.1,MW=121.14 g/mol i) For each of the following, calculate the concentration of Tris, Tris-H+ and the pH of the solution in each of the following solutions. 12.1 g of Tris is added to water of total volume of 1 L. 4 mL of 10 M HCl added to solution in a). 1 mL of 10 M HCl added to solution in b) 1.7 mL of 10 M HCl added to solution in c) 7 mL of 10 M HCl added to solution in d) ii) For the series of HCl added condition, draw a titration curve of pH with respect to the molar equivalents of HCl added.