Numero de transporte

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  • Publicado : 6 de noviembre de 2009
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POTENCIALES DE UNIÓN LIQUIDA Y NUMERO DE TRANSFERENCIA

ABSTRACT

With the purpose of studying a concentration cell with transfer to different concentrations you uses the system Ag/AgCl/HCl(0.1M)/HCl(Ci)/AgCl/Ag, their potentials were measured for the different concentrations of HCl, starting from which the coefficients of activity means were calculated (?±) and the numbers of transport(t+), additionally you study the effect of the concentration of salt in the bridge on the potentials of union, by means of the calculations made for the two potentials of union of the cell Ag/AgCl/HCl(0.100m)/KCl (Ci)/KCl (0.100m)/AgCl/Ag, calculating the first one by means of the equation of Lewis-Sanger.

Datos

• Celda de Concentración con Transferencia

Ag/AgCl/HCl(0.1M)/HCl(Ci)/AgCl/Ag (1)

Tabla 1. Potenciales obtenidos con un puente salino de HCl
|Solución(M) |Puente(M) |Potencial(mV) |
|0.0125 |0.1|62.2 |
|0.025 |0.1 |45.6 |
|0.05 |0.1 |24.3|
|0.1 |0.1 |-0.9 |

• Efecto de la Concentración de la Sal en el Puente Salino sobre los Potenciales de Unión LíquidaAg/AgCl/HCl(0.1 M)/KCl(Ci)/KCl (0.1M)/AgCl/Ag (2)

Tabla 2. Potenciales obtenidos con un puente salino de KCl
|Solución(M) |Puente(M) |Potencial(mV) |
|0.1|0.1 |25.6 |
|0.2 |0.1 |19.4 |
|0.5 |0.1 |12.2|
|1.0 |0.1 |7.9 |
|2.0 |0.1 |3.1 |
|3.5 |0.1...
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