The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0.015 A for 15 minutes is _______ ×10−4 g×10−4 g.(( Atomic mass of zinc =65.4amu)
Question
The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0.015 A for 15 minutes is _______ ×10−4 g×10−4 g.(( Atomic mass of zinc =65.4amu)
Solution
Para resolver este problema, sigamos los siguientes pasos:
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Calcular la cantidad de carga (Q) que pasa a través de la solución:
La carga se calcula usando la fórmula: donde es la corriente en amperios (A) y es el tiempo en segundos (s).
Dado que la corriente es A y el tiempo es minutos, primero convertimos el tiempo a segundos:
Ahora, calculamos la carga:
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Determinar la cantidad de moles de electrones (n) usando la carga:
Usamos la constante de Faraday (), que es aproximadamente :
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Relacionar los moles de electrones con los moles de zinc:
La reacción de reducción del zinc en la electrólisis es: Esto significa que se necesitan 2 moles de electrones para reducir 1 mol de zinc.
Por lo tanto, los moles de zinc producidos son:
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Calcular la masa de zinc producida:
Usamos la masa atómica del zinc ():
Por lo tanto, la masa de zinc producida es .
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