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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] |
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Answer» Solution :`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` |
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