
Cálculos pH
Presentation
•
Chemistry
•
11th Grade
•
Easy
Sandra Lizeth Iturbe Requena
Used 17+ times
FREE Resource
4 Slides • 6 Questions
1
Cálculos pH
2
Cálculo de pH y pOH a partir de concentraciones de H3O+ o OH-
En la calculadora -log ( concentración dada en el problema)
Ejemplo:
Calcula pH de una solución [H3O+] = 4.3x10-3
-log(4.3x10-3) = 2.37
pH= 2.37
3
Multiple Choice
Calcula el pH de la solución [H3O+] = 1.0 X10-4 M
4.00
2.10
7.35
14.90
4
Multiple Choice
Calcula el pH de la solución [H3O+] = 3.0X10-9 M
4.01
8.52
13.52
11.20
5
Cálculo de [H3O+] o [OH-] desde pH o pOH
En la calculadora 10^ ( el pH o pOH dado en el problema en NEGATIVO)
Ejemplo:
Calcular [H3O+] de una solución con pH = 13
10^(-13) = 1x10-13
[H3O+]= 1x10-13
6
Multiple Choice
Calcula [H3O+] para café, pH de 5.0
1.5X10–7M
0.5X10–3 M
0.2X10–5 M
1X10–5 M
7
Multiple Choice
Calcula [H3O+] para bicarbonato de sodio, pH de 8.25
3.6X10–9 M
4.2X10–5 M
5.6X10–9 M
3.0X10–8 M
8
Cálculo de pH a partir de pOH
Calcular el pOH de la sustancia
pOH= -log(concentración de OH dada en el problema)
Restar 14- pOH para obtener el pH
Ejemplo:
Calcula el pH de una solución dado que [OH]=2.5x10-4
pOH= -log(2.5x10-4) = 3.60
pH= 14- 3.60 = 10.40
9
Multiple Choice
Calcula el pH de la solución [OH-] = 1.0X10-5 M
4.00
9.00
8.52
12.00
10
Multiple Choice
Calcula el pH de la solución [OH-] = 2.5X10-11 M
3.40
5.00
1.23
11.20
Cálculos pH
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