Question

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.

Answer 1

(a) Human muscle fluid 6.83:
$pH=6.83pH=–log\left[H^{+}\right]\therefore 6.83=–log\left[H^{+}\right]\left[H^{+}\right]=1.48\times {10}^{-7}M$

(b) Human stomach fluid, 1.2:
$pH=1.21.2=–log\left[H^{+}\right]\therefore \left[H^{+}\right]=0.063$

(c) Human blood, 7.38:
$pH=7.38=-log\left[H^{+}\right]\therefore \left[H^{+}\right]=4.17\times {10}^{-8}M$

(d) Human saliva, 6.4:
$pH=6.46.4=–log\left[H^{+}\right]\left[H^{+}\right]=3.98\times {10}^{-7}$