EJEMPLOS DE PH

pH= -log [H+]

EJERCICIO 1:
1.-
pH=4.3
[4.3= -log [H+]] -1
-4.3=log [H+]
-4.3= log [H+]
10x 10x
10-4.3 =[H+]
=5.01 X 10-5 meq/dl
=0.0000501 meq/dl

2.-
pH=4.1
[4.1= -log [H+]] -1
-4.1=log [H+]
-4.1= log [H+]
10x 10x
10-4.1 =[H+]
=7.94 x 10-5 meq/dl
=0.0000794 meq/dl

El pH 4.1 tiene 1.6 mas [H+] que el pH 4.3, porque 4.1 es 1.58 veces más grande que el pH de 4.3.

EJERCICIO 2

1) Sangre arterial pH 7.4
2) Sangre venosa pH 7.35
3) Orina pH 4.5- 8.0
4) Acido clorhidrico pH 0.8

1)
pH=7.4
[7.4= -log [H+]] -1
-7.4=log [H+]
-7.4= log [H+]
10x 10x
10-7.4 =[H+]
=0.000000039 meq/ dl

2)
pH=7.35
[7.35= -log [H+]] -1
-7.35=log [H+]
-7.35= log [H+]
10x 10x
10-7.35 =[H+]
=0.000000044 meq/ dl

3)
pH=4.5
[4.5= -log [H+]] -1
-4.5=log [H+]
-4.5= log [H+]
10x 10x
10-4.5 =[H+]
=0.00003162 meq/ dl

4)
pH=8
[8= -log [H+]] -1
-8=log [H+]
-8= log [H+]
10x 10x
10-8 =[H+]
=0.00000001 meq/ dl

5)
pH=0.8
[0.8= -log [H+]] -1
-0.8=log [H+]
-0.8= log [H+]
10x 10x
10-0.8 =[H+]
=0.1584 meq/ dl

Acido clorídrico 0.1584 / Sangre arterial 0.000000039
= 4061538.462

El ph 0.8 tiene 4061538.462 mas [H+] que el pH 7.4 entonces decimos que el acido cloridrico es mas acido que la sangre arterial.