Saved Bookmarks
| 1. |
The pH of blood stream is maintained by a proper balance of `H_(2)CO_(3)` and `NaHCO_(3)` concentration. What volume of 5 M `NaHCO_(3)` solution should be mixed with a 10 mL sample of blood which is 2 M in `H_(2)CO_(3)` in order to maintain its pH ? `[pk_(a)" for "H_(2)CO_(3)=6.1][10^(1.3)=19.9]`A. 40 mLB. 38 mLC. 50 mLD. 79 mL |
|
Answer» Correct Answer - D `pH=pK_(a)+log.((HCO_(3)^-))/((H_(2)CO_(3)))` Let V mL of `NaHCO_(3)` is required moles of `H_(2)CO_(3)` `=2xx0.01=0.02` Let V mL of `NaHCO_(3)` is required moles of `Na_(2)CO_(3)` `=5xxV=5V` ltBrgt `thereforepH=pKa+log((5V)/(0.02))` 7.4=6.1+log`((5V)/(0.02))` ltBrgt `rArr v=79ml` |
|