What is the pH of 0.01M glycine solution ? For glycine K_(a_(1))=4.5xx10^(-3) and K_(a_(2))=1.7xx10^(-10) at 398 K

What is the pH of 0.01M glycine solution ? For glycine K_(a_(1))=4.5x

1.	What is the pH of 0.01M glycine solution ? For glycine K_(a_(1))=4.5xx10^(-3) and K_(a_(2))=1.7xx10^(-10) at 398 K
Answer» `3.0` `10.0` `6.1` `7.2` Solution :Glycine `H_(3)N^(+)CH_(2)CO O^(-)` is more acidic than basic. Instead of `K_(b)` value, the SECOND given `K_(a)` value is corresponding to the `K_(b)` value `(.:' K_(a)xxK_(b)=10^(-14))`.Hence, OVERALL IONIZATION constant, `K_(a_(1))xxK_(a_(2))=4.5xx10^(-3)xx1.7xx10^(-10)` `=7.65xx10^(-13)` `[H^(+)]=sqrt(KC)=sqrt(7.65xx10^(-13)xx0.01)` `=sqrt(0.765xx10^(-14))=0.87xx10^(-7)M` `pH = - log (0.87xx10^(-7))=7-0.93=6.07`