Chapter 14, Problem 31CI

A volume of 200.0 mL of a carbonic acid buffer for blood plasma is prepared that contains 0.403 g of ${\text{NaHCO}}_{\text{3}}$ and 0.0149 g of ${\text{H}}_{\text{2}}{\text{CO}}_{\text{3}}$ . At body temperature (37°C), the ${\text{K}}_{\text{a}}$ of carbonic acid is $7.9\times {10}^{-7}$ . (7.2, 7.3, 8.4, 14.9)

1. $H_{2}C{O}_3\left(aq\right)+H_{2}O\left(l\right)\stackrel{}{\rightleftarrows }HC{O}_3^{-}\left(aq\right)+H_3{O}^{+}\left(aq\right)$
2. What is the $H_{2}C{O}_3$?
3. What is the $HC{O}_3^{-}$?
4. What is the $H_3{O}^{+}$?
5. What is the pH of the buffer?
6. Write a balanced chemical equation that shows how this buffer neutralizes added acid.
7. Write a balanced chemical equation that shows how this buffer neutralizes added base.