At pH = 4 glycine exists as

Question

At pH = 4 glycine exists as (A) H3N+ - CH2 - COO- (B) H3N+ -CH2 - COOH (C) H2N-CH2-COOH (D) H2N-CH2-COO-

Tardigrade Admin · Accepted Answer

At pH =4, an amphoteric Zwitter ion structure when an acid is added to it. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/c1f1e09367a4429e66520ae1967db01b-.png" />

Q. At $p H = 4$ glycine exists as

$H_{3} N^{+} - C H_{2} - CO O^{-}$

$H_{3} N^{+} - C H_{2} - COO H$

$H_{2} N - C H_{2} - COO H$

$H_{2} N - C H_{2} - CO O^{-}$

At $p H = 4$ , an amphoteric Zwitter ion structure when an acid is added to it.

Q. At pH=4 glycine exists as

H3​N+−CH2​−COO−

H3​N+−CH2​−COOH

H2​N−CH2​−COOH

H2​N−CH2​−COO−