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The ph of blood stream is maintained by ...

The `ph` of blood stream is maintained by a proper balance of `H_(2)CO_(3)` and `NaHCO_(3)` concentrations. What volume of `5M NaHCO_(3)` solution, should be mixed with `10mL` sample of blood which is `2M` in `H_(2)CO_(3)` in order to maintain a `pH` of `7.4.K_(a)` for `H_(2)CO_(3)` in blood is `7.8 xx 10^(-7)`?

Text Solution

Verified by Experts

`pH=pK_(a_(1))+log""([HCO_(3)^(-)])/([H_(2)CO_(3)])`
`rArr 7.4=6.7+log""([HCO_(3)^(-)])/([H_(2)CO_(3)]) rArr ([HCO_(3)^(-)])/([H_(2)CO_(3)])=5`
`:.5xx"moles of" H2CO3`=Moles of `HCO_(3)^(-)` (since both are components of same solution,volume of solution would be same for both)
`rArr :.5xx2.5xx10xx10^(-3)=5-VrArr "required volume"=0.025L=25mL`
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