Question 21 You made a pH 9.5 buffer solution at 25∘C by mixing NaOH and lysine (Lys) to give a solution that is 0.2 M in total concentration of lysine. Lysine has three ionizable groups, with the following pKa values pK1 = 2.2 pK2 = 9.0 pK3 = 10.5 Answer the questions below with two significant figures. All questions pertain to 25oC. Part A. Calculate the concentration of Lys2+. Part B.  Calculate the concentration of Lys+. Part C. Calculate the concentration of Lys(neutral). Part C. Calculate the concentration of Lys-. Part D. What is the proton concentration? Part E. What is the OH- concentration? Part F. What is the Na+ concentration?

The original iconic Coca-Cola bottle was called the:

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Tick all that is true: