Knowee
Questions
Features
Study Tools

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)

🧐 Not the exact question you are looking for?Go ask a question

Solution

Para resolver este problema, sigamos los siguientes pasos:

  1. Calcular la cantidad de carga (Q) que pasa a través de la solución:

    La carga se calcula usando la fórmula: Q=I×t Q = I \times t donde I I es la corriente en amperios (A) y t t es el tiempo en segundos (s).

    Dado que la corriente es 0.015 0.015 A y el tiempo es 15 15 minutos, primero convertimos el tiempo a segundos: t=15min×60s/min=900s t = 15 \, \text{min} \times 60 \, \text{s/min} = 900 \, \text{s}

    Ahora, calculamos la carga: Q=0.015A×900s=13.5C Q = 0.015 \, \text{A} \times 900 \, \text{s} = 13.5 \, \text{C}

  2. Determinar la cantidad de moles de electrones (n) usando la carga:

    Usamos la constante de Faraday (F F ), que es aproximadamente 96485C/mol 96485 \, \text{C/mol} : n=QF=13.5C96485C/mol1.4×104mol n = \frac{Q}{F} = \frac{13.5 \, \text{C}}{96485 \, \text{C/mol}} \approx 1.4 \times 10^{-4} \, \text{mol}

  3. Relacionar los moles de electrones con los moles de zinc:

    La reacción de reducción del zinc en la electrólisis es: Zn2++2eZn \text{Zn}^{2+} + 2e^- \rightarrow \text{Zn} Esto significa que se necesitan 2 moles de electrones para reducir 1 mol de zinc.

    Por lo tanto, los moles de zinc producidos son: Moles de Zn=1.4×104mol de electrones2=0.7×104mol de Zn \text{Moles de Zn} = \frac{1.4 \times 10^{-4} \, \text{mol de electrones}}{2} = 0.7 \times 10^{-4} \, \text{mol de Zn}

  4. Calcular la masa de zinc producida:

    Usamos la masa atómica del zinc (65.4g/mol 65.4 \, \text{g/mol} ): Masa de Zn=Moles de Zn×Masa atoˊmica de Zn=0.7×104mol×65.4g/mol \text{Masa de Zn} = \text{Moles de Zn} \times \text{Masa atómica de Zn} = 0.7 \times 10^{-4} \, \text{mol} \times 65.4 \, \text{g/mol}

    Masa de Zn=45.78×104g \text{Masa de Zn} = 45.78 \times 10^{-4} \, \text{g}

Por lo tanto, la masa de zinc producida es 45.78×104g 45.78 \times 10^{-4} \, \text{g} .

This problem has been solved

Similar Questions

A zinc-copper cell is constructed:Zn | Zn || Cu | Cu.What occurs to the mass of the copper electrode as the reaction proceeds? Group of answer choicesIt remains the same.It increases.cannot be determinedIt decreases.

The student obtains a pure, dry sample of zinc sulfate crystals.The formula of zinc sulfate crystals is ZnSO4 .7H2 O(i) Calculate the relative molecular mass (Mr ) of zinc sulfate crystals. (2) Mr = ..............................................................(ii) The student uses 0.0200 mol of dilute sulfuric acid in her preparation.Show that the maximum mass of zinc sulfate crystals that the student could obtain is about 6 g. (2)(iii) The student obtains a mass of 4.28 g of zinc sulfate crystals.Calculate the percentage yield of the zinc sulfate crystals.Give your answer to three significant figures.

2.0 grams of Zn reacts with excess oxygen to produce ZnO. What is the mass of ZnO produced?2019 Atomi QuestionA(Choice A)

A sample of zinc has the following composition:What is the relative atomic mass of the zinc in this sample?A. 64.5B. 65.0C. 65.9D. 66.4

What mass of aluminum will be produced by the electrolysis of molten AlCl3, if a current of 50.0 amps is run for 30.0 minutes?8.40 g Al25.2 g Al0.14 g Al75.6 g Al

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.