The pH of several solutions was measured in a hospital laboratory; convert each of the following pH values into the molar concentration of H 3 O ions: (a) 4.8 (the pH of a urine sample); (b) 0.7 (the pH of a sample of fluid extracted from a stomach); (c) 7.4 (the pH of blood); (d) 8.1 (the pH of exocrine pancreatic secretions)

(a)   1.6 x 10⁻⁵ M

(b)   0.20 M

(c)   4.0x 10⁻⁸ M

(d)   7.9 x 10⁻⁹ M

Explanation:

The pH value is the negative logarith of the concentration of hydronium ions in solution:

pH = - log[H₃O⁺]

so to convert the given pHs in this question to molar concentration of H₃O⁺, we need to take the  inverse logarhitmic function of minus  pH.

(a) pH (urine) = 4.8

inverse log (- 4.8 ) = 10^(-4.8) = 1.6 x 10⁻⁵

[H₃O⁺] urine = 1.6 x 10⁻⁵ M

(b) pH (stomach fluid) =0.7 M

inverse log (-0.7) = 10^(-0.7) = 0.20

[H₃O⁺] stomach fluid = 0.20 M

(c) pH (blood) = 7.4

inverse log (-7.4) = 10^(-7.4) =4.0x 10⁻⁸

[H₃O⁺] blood = 4.0x 10⁻⁸ M

(d) pH (pancreatic ) = 8.1

inverse log (-8.1) = 10^(-8.1) = 7.5 x 10⁻⁹

[H₃O⁺] pancreatic  = 7.9 x 10⁻⁹ M

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

56 moles of   lieter in chemistry