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 = 6.83 pH = – log [H+] 

6.83 = – log [H+] 

[H+] =1.48 × 10–7 M

(b) Human stomach fluid, 1.2: 

pH =1.2 1.2 = – log [H+] 

[H+] = 0.063 

(c) Human blood, 7.38: 

pH = 7.38 = – log [H+] 

[H+] = 4.17 × 10–8 M 

(d) Human saliva, 6.4: 

pH = 6.4 6.4 = – log [H+] 

[H+] = 3.98 × 10–7