Question

Электролизом добыт 1кг меди. Сколько серебра можно получить, если пропустить через соответствующий электролит то же количество электричества? ​

Answer 1

Ответ:

Объяснение:

Дано:

m₁ = 1 кг

k₁ = 0,329·10⁻⁶ кг/Кл - электрохимический эквивалент меди

k₂ = 1,118·10⁻⁶ кг/Кл - электрохимический эквивалент серебра

q₁ = q₂ = q

_____________

m₂ - ?

Запишем закон Фарадея:

m = k·I·t

Учитывая, что:

q = I·t

запишем:

m = k·q

m₁  = k₁·q

Отсюда:

q = m₁ / k₁

Тогда

m₂  = k₂·q = k₂·m₁/k₁

m₂  = 1,118·10⁻⁶ ·1 / (0,329·10⁻⁶ ) = 1,118 / 0,329 ≈ 3,4 кг

Answer 2

Electrolysis and Production of Silver

When 1 kg of copper is obtained by electrolysis, the amount of silver that can be obtained by passing the same amount of electricity through an appropriate electrolyte can be calculated using the Faraday's laws of electrolysis.

According to Faraday's laws of electrolysis, the mass of substance deposited or liberated at an electrode during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.

The molar mass of copper (Cu) is approximately 63.55 g/mol, and the molar mass of silver (Ag) is approximately 107.87 g/mol.

Using the molar masses and Faraday's laws of electrolysis, we can calculate the amount of silver that can be obtained when the same amount of electricity used to produce 1 kg of copper is passed through an appropriate electrolyte.

Calculation

1. Calculate the number of moles of copper: - 1 kg of copper is equal to 1000 g. - Number of moles of copper = (mass of copper) / (molar mass of copper) - Number of moles of copper = 1000 g / 63.55 g/mol

2. Use the mole ratio to find the number of moles of silver: - According to the balanced chemical equation for the electrolysis of copper sulfate, for every 2 moles of electrons passed, 1 mole of copper is deposited. - Similarly, for every 2 moles of electrons passed, 1 mole of silver can be deposited.

3. Calculate the mass of silver: - Mass of silver = (number of moles of silver) * (molar mass of silver)

Conclusion

By applying the principles of Faraday's laws of electrolysis and using the molar masses of copper and silver, the amount of silver that can be obtained by passing the same amount of electricity used to produce 1 kg of copper through an appropriate electrolyte can be calculated.