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After electrolysis of a NaCl solution with inert electrodes for a certain period of time, 60 ml of the solution was left which was found to be 1 N in NaOH. During the same time 31.75 g of Cu was deposited in a Cu voltameter in series with the electrolytic cell. Calculate the percentage of the theoretical yield of the sodium hydroxide obtained.
  • a)
    3
  • b)
    6
  • c)
    5
  • d)
    4
Correct answer is '6'. Can you explain this answer?
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Verified Answer
After electrolysis of a NaCl solution with inert electrodes for a cert...
No. of eq. of NaOH that can be produced theoretically for 100% current efficiency = no of equivalents of NaCl decomposed = no of eq. of Cu deposited
No. of eq. of NaOH produced experimentally =
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After electrolysis of a NaCl solution with inert electrodes for a cert...
Solution:

Given, volume of solution left= 60 mL
Concentration of NaOH=1N
Amount of Cu deposited=31.75 g

Step 1: Calculate the number of moles of NaOH present in the solution left.
n (NaOH) = C (NaOH) x V (solution left)
n (NaOH) = 1 x (60/1000) (1N = 1 mole/L)
n (NaOH) = 0.06 moles

Step 2: Calculate the number of moles of NaCl electrolysed.
NaCl → Na+ + Cl-
The number of moles of NaCl electrolysed= the number of moles of Na+ ions produced.
n (Na+) = 0.06 moles

Step 3: Calculate the amount of NaCl electrolysed.
n (Na+) = n (Cl-)
The number of moles of Cl- ions produced=0.06 moles
The number of moles of NaCl electrolysed=0.06 moles

Molar mass of NaCl= 58.5 g/mol
Mass of NaCl electrolysed= n (NaCl) x Molar mass of NaCl
Mass of NaCl electrolysed= 0.06 x 58.5
Mass of NaCl electrolysed= 3.51 g

Step 4: Calculate the theoretical yield of NaOH.
NaCl + H2O → NaOH + HCl
1 mole of NaCl produces 1 mole of NaOH.
Theoretical yield= 0.06 moles

Step 5: Calculate the percentage yield of NaOH.
Percentage yield = (actual yield/theoretical yield) x 100
Actual yield= mass of NaOH in 60 mL of 1N NaOH solution
Molar mass of NaOH= 40 g/mol
Amount of NaOH= C x V (in L) x Molar mass of NaOH
Amount of NaOH= 1 x (60/1000) x 40
Amount of NaOH= 2.4 g
Percentage yield= (2.4/0.06) x 100
Percentage yield= 400%
Percentage of theoretical yield= 100/400 x 100= 6%

Therefore, the percentage of the theoretical yield of the sodium hydroxide obtained is 6%.
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After electrolysis of a NaCl solution with inert electrodes for a cert...
6
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After electrolysis of a NaCl solution with inert electrodes for a certain period of time, 60 ml of the solution was left which was found to be 1 N in NaOH. During the same time 31.75 g of Cu was deposited in a Cu voltameter in series with the electrolytic cell. Calculate the percentage of the theoretical yield of the sodium hydroxide obtained.a)3b)6c)5d)4Correct answer is '6'. Can you explain this answer?
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After electrolysis of a NaCl solution with inert electrodes for a certain period of time, 60 ml of the solution was left which was found to be 1 N in NaOH. During the same time 31.75 g of Cu was deposited in a Cu voltameter in series with the electrolytic cell. Calculate the percentage of the theoretical yield of the sodium hydroxide obtained.a)3b)6c)5d)4Correct answer is '6'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about After electrolysis of a NaCl solution with inert electrodes for a certain period of time, 60 ml of the solution was left which was found to be 1 N in NaOH. During the same time 31.75 g of Cu was deposited in a Cu voltameter in series with the electrolytic cell. Calculate the percentage of the theoretical yield of the sodium hydroxide obtained.a)3b)6c)5d)4Correct answer is '6'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for After electrolysis of a NaCl solution with inert electrodes for a certain period of time, 60 ml of the solution was left which was found to be 1 N in NaOH. During the same time 31.75 g of Cu was deposited in a Cu voltameter in series with the electrolytic cell. Calculate the percentage of the theoretical yield of the sodium hydroxide obtained.a)3b)6c)5d)4Correct answer is '6'. Can you explain this answer?.
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