Equivalent Weight Formula:
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Definition: This calculator determines the equivalent weight of a substance based on the mass of ions produced or consumed during electrolysis, the current flowing, and the time taken.
Purpose: It helps chemists and electrochemists quantify the relationship between electrical charge and chemical change in electrolytic processes.
The calculator uses Faraday's law of electrolysis formula:
Where:
Explanation: The formula relates the mass of substance deposited or dissolved at an electrode to the quantity of electricity passed through the electrolyte.
Details: Calculating equivalent weight is crucial for understanding stoichiometry in electrochemical reactions, determining purity of substances, and designing electrochemical cells.
Tips: Enter the mass of ions in kilograms, current in amperes, and time in seconds. All values must be positive numbers.
Q1: What is Faraday's constant?
A: Faraday's constant (96485 C/mol) represents the electric charge carried by one mole of electrons.
Q2: How do I measure the mass of ions?
A: Measure the mass difference of the electrode before and after electrolysis.
Q3: What units should I use?
A: Use kilograms for mass, amperes for current, and seconds for time to get equivalent weight in kg.
Q4: Can I use this for any electrolyte?
A: Yes, as long as you know the mass change and can measure current and time accurately.
Q5: Why is equivalent weight important?
A: It helps determine the amount of substance that will react with or be produced by a given quantity of electricity.