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)`[H^(+)]` of human muscles fluid
`pH=6.83 " or " - log [H^(+)]= 6.83 " or " log [H^(+)] =- 6.83 =bar(7).17`
`[H^(+)] = " Antilog " [H^(+)] = " Antilog [bar(7).17] = 1.479 xx 10^(-7) M`
(b) `[H^(+)]` of human stomach fluid
`pH =1.2 "or " - log [H^(+)] =1.2 " or " log [H^(+)] =- 1.2`
`[H^(+)] = " Antilog " (-1.2) = " Antilog (bar(2).8) =6.309 xx 10^(-2) M`
(c) `[H^(+)]` of human blood
`pH =7.38 " or " - log [H^(+)] =7.38 " or " log [H^(+)] =- 7.38`
`[H^(+)] = "Antilog " (-7.38) = " Antilog"(bar(8).62) =4.168 xx 10^(-8) M`
(d) `[H^(+)]` of human saliva
`pH =6.4 " or " - log [H^(+)] =6.4 " or " log [H^(+)] =- 6.4`
`[H^(+)] = " Antilog (-6.4) = " Antilog " (bar(7).6) =3.98 xx 10^(-7) M.`