(Solved): 6. The amino acid glycine is often used as an ingredient in buffers for biochemistry experiments. T ...

6. The amino acid glycine is often used as an ingredient in buffers for biochemistry experiments. The amino group of glycine has a pKa of 9.6. Glycine exists in either a protonated form \( \left(-\mathrm{NH}_{3}{ }^{+}\right) \)or a free base \( \left(-\mathrm{NH}_{2}\right) \). a) In what \( \mathrm{pH} \) range can glycine be used as an effective buffer? b) In a \( 0.1 \mathrm{M} \) solution of glycine at \( \mathrm{pH} 9.0 \), what fraction has its amino group in the protonated form? c) When \( 99 \% \) of the glycine is in the protonated from, what is the numerical relation between the \( \mathrm{pH} \) of the solution and the \( \mathrm{pKa} \) of the amino group?