When a lead acid car battery is recharged by the alternator it acts essentially

Question

When a lead acid car battery is recharged by the alternator it acts essentially as an electrolytic cell in when solid lead (I) sulfate (Pbso_4) is reduced to lead at the cathode and oxidized to solid lead (II) oxide (Pbo) at the anode. Suppose a current of 19.0 A is fed into a car battery for 75.0 seconds. Calculate the mass of lead deposited on the cathode of the battery. Round to 3 significant digits. Suppose a current of 90. A flows through a copper wire for 7.0 minutes. Calculate how many moles of electrons travel through the wire. Be sure your answer has the correct unit symbol and the correct number of significant digits.

Explanation / Answer

1. Acording to Faradays 1st law of electrolysis,

W=zIT, W= weight of aubstance deposited, I=current in ampere, T= Time in Second, Z= electrochemical equivalance

Now, z= equivalent weight / 96500

for Lead equivalent weight= atomic weight / valency = 207/2=103.5

now W= 103.5*19*75/96500= 1.528gm of Pb deposited

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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