Chemistry, 17.06.2020 05:57 maciemessing2
The amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments. The amino group of glycine, which has a pKa of 9.6, can exist either in the protonated form (-NH3+) or as the free base (−NH2), because of the reversible equilibrium:
R-NH3+ left right double arrow R−NH2 + H+
A) In what pH range can glycine be used as an effective buffer due to its amino group?B) In a 0.1 M solution of glycine at pH 9.0, what fraction of glycine has its amino group in the -NH3+ form?C) How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0?D) When 99% of the glycine is in its -NH3+ form, what is the numerical relation between the pH of the solution and the pKa of the amino group?
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The amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments....
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