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When electrolysis of KCl is doen in alka...

When electrolysis of `KCl` is doen in alkaline medium, `10g` of `KClO_(3)` is produced as follows `:`
`Cl^(-)+6overset(-)(O)H rarr ClO_(3) +3H_(2)O+6e^(-)`
A current of `2A` is passed for `10.941 ` hours. Calculate the `((% current efficiency)/(10))` used in the process.
`(Mw` of `KClO_(3)=122.5)`

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To solve the problem step by step, we will follow the outlined process to calculate the current efficiency of the electrolysis of KCl in an alkaline medium. ### Step 1: Calculate the total charge passed during electrolysis The total charge (Q) can be calculated using the formula: \[ Q = I \times t \] where: - \( I \) = current in amperes (A) - \( t \) = time in seconds (s) Given: - \( I = 2 \, \text{A} \) - \( t = 10.941 \, \text{hours} \) First, convert time from hours to seconds: \[ t = 10.941 \, \text{hours} \times 3600 \, \text{seconds/hour} = 39400 \, \text{seconds} \] Now, calculate the charge: \[ Q = 2 \, \text{A} \times 39400 \, \text{s} = 78800 \, \text{C} \] ### Step 2: Convert charge to Faraday To convert the charge in coulombs to Faraday (F), use the relationship: \[ \text{Charge in Faraday} = \frac{Q}{96500} \] where 96500 C is the charge of one mole of electrons (Faraday's constant). Now, calculate the charge in Faraday: \[ \text{Charge in Faraday} = \frac{78800 \, \text{C}}{96500 \, \text{C/mol}} \approx 0.816 \, \text{F} \] ### Step 3: Determine the amount of KClO3 produced theoretically From the reaction, we know that 6 Faraday produces 1 mole of KClO3 (122.5 g). We can set up a proportion to find out how much KClO3 can be produced with the charge we calculated. Using the relationship: \[ \text{grams of KClO3} = \frac{122.5 \, \text{g}}{6 \, \text{F}} \times \text{Charge in Faraday} \] Substituting the value of Charge in Faraday: \[ \text{grams of KClO3} = \frac{122.5 \, \text{g}}{6} \times 0.816 \approx 16.67 \, \text{g} \] ### Step 4: Calculate the current efficiency Current efficiency is calculated using the formula: \[ \text{Current Efficiency} (\%) = \left( \frac{\text{Actual yield}}{\text{Theoretical yield}} \right) \times 100 \] Given that the actual yield of KClO3 is 10 g: \[ \text{Current Efficiency} (\%) = \left( \frac{10 \, \text{g}}{16.67 \, \text{g}} \right) \times 100 \approx 60 \% \] ### Step 5: Calculate \(\frac{\text{Current Efficiency}}{10}\) Finally, we need to calculate \(\frac{\text{Current Efficiency}}{10}\): \[ \frac{60}{10} = 6 \] ### Final Answer The answer is: \[ 6 \]

To solve the problem step by step, we will follow the outlined process to calculate the current efficiency of the electrolysis of KCl in an alkaline medium. ### Step 1: Calculate the total charge passed during electrolysis The total charge (Q) can be calculated using the formula: \[ Q = I \times t \] where: - \( I \) = current in amperes (A) - \( t \) = time in seconds (s) ...
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