What is the predicted cell potential in volts for the cell to the previous probl

Question

What is the predicted cell potential in volts for the cell to the previous problem? Given an answer to two decimal places. A Cu/Cu2+ electrolysis cell was used to determine Avogadro's Number The copper cathode increased in mass by 0.042 grams after running the cell for 452 seconds at 0 43 amps What experimental value for Avogadro's Number is determined from this data? The electron charge = 1,6 Times 10^19 C/e^- Report your answer as Times 10^23 with 2 significant figures. Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Explanation / Answer

Total charge passed = current*time in seconds = 0.43*452 = 194.36 Coulombs

Total moles of Cu deposited = mass/molar mass = 0.042/63.5 = 0.00066

Now, for 0.00066 moles of Cu to deposit , charge required = 194.36 C

Thus, for 1 mole of Cu to deposit, charge required = 293853.8 C

for 1 equivalent(moles/2) of Cu to deposit, charge required = 146926.9 C

Now, 1 C = 6.24*1018 electrons

Thus, 146926.9 C = 9.16*1023 electrons = Avagadro's number

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.