Calculate the hydrogen ion concentration in the following biological fluids whose `pH` are given below:
a. Human muscle-fluid, `6.83`
b. Human stomach fluid, `1.2`
c. Human blood, `7.38`
d. Human saliva, `6.4`.

Explanation

(a) `pH=6.83`
or `-log[H^(+)]=6.83`
`:. [H^(+)]=1.479xx10^(-7)M`
(b) `pH=1.2`
or `-log [H^(+)]=1.2`
`:. [H^(+)]=6.31xx10^(-2)M`
(c ) `pH=7.38`
or `-log[H^(+)]=7.38`
`:. [H^(+)]= 4.17xx10^(-7)M`
(d) `pH=6.4`
or `-log[H^(+)]=6.4`
`:. [H^(+)]= 3.98xx10^(-7)M`