Problemas de pH

Problema 1

Calculo de pH

pH= -log [H⁺]

4.3= -log [H⁺]

-4.3 = log [H⁺]

10^x 10^x

10 ^-4.3 = [H⁺]

= 5.01 x 10 ^-5

= .000050118 m eq. /dl

pH= -log [H⁺]

4.1= -log [H⁺]

-4.1 = log [H⁺]

10^x 10^x

10 ^-4.1 = [H⁺]

= 7.943 x 10 ^-5

Comparación:

7.943 x 10 ^-5 / 5.01 x 10 ^-5 = 1.58

* El pH 4.1 tiene casi 1.6 mas [H⁺] que el pH 4.3

Problema 2

Sustancia	pH	[H+]
Sangre arterial	7.4	3.9 X 10 -8
Sangre venosa	7.35	4.46 X 10 -8
Orina	4.5-8	3.16 X 10 -8 - 1 X 10 -8
HCl	0.8	0.15

Sangre arterial

pH = 7.4

7.4= -log [H⁺]

7.4 = log [H⁺]

10^x 10^x

10 ^-7.4= [H⁺]

[H⁺] = 3.9 X 10 ^-8

HCl / sangre arterial = 0.15 / 3.9 X 10 ^-8

= 3.8 x 10 ⁶

= el HCl tiene 3.8 x 10 ⁶ mas [H⁺] que la sangre arterial