Question: In electrolysis, if 1 mole of electrons is transferred, how many grams of copper can be deposited from Cu²⁺?
Options:
63.5 g
31.75 g
127 g
159 g
Correct Answer: 63.5 g
Solution:
1 mole of Cu²⁺ deposits 63.5 g of copper.
In electrolysis, if 1 mole of electrons is transferred, how many grams of copper
Practice Questions
Q1
In electrolysis, if 1 mole of electrons is transferred, how many grams of copper can be deposited from Cu²⁺?
63.5 g
31.75 g
127 g
159 g
Questions & Step-by-Step Solutions
In electrolysis, if 1 mole of electrons is transferred, how many grams of copper can be deposited from Cu²⁺?
Step 1: Understand that in electrolysis, when we transfer 1 mole of electrons, it can reduce 1 mole of Cu²⁺ ions.
Step 2: Know that the molar mass of copper (Cu) is 63.5 grams per mole.
Step 3: Since 1 mole of Cu²⁺ is deposited when 1 mole of electrons is transferred, it means we can deposit 1 mole of copper.
Step 4: Therefore, the amount of copper deposited is equal to the molar mass of copper, which is 63.5 grams.
Electrolysis – The process of using electrical energy to drive a non-spontaneous chemical reaction, specifically the deposition of metals from their ions.
Faraday's Laws of Electrolysis – The amount of substance deposited or liberated during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.
Molar Mass of Copper – The molar mass of copper (Cu) is approximately 63.5 g/mol, which is essential for calculating the mass of copper deposited.
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