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7.5 gm glycine is added to 500 ml water. What is the pH of the solution
$(G i v e n : p K a_{1} (g l y c i n e) = 2.4; p K a_{2} (g l y c i n e) = 9.54)$

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9.58

6.15

2.58

5.97

answer is D.

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Detailed Solution

$\overset{\oplus}{{NH}_{3}} - {CH}_{2} - {COO}^{-} (glycine)is amphoteric$

$Hence, pH = \frac{2 .4 + 9 .54}{2} = 5 .97$

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