Pre-lab 9 : Lead Storage Batteries. Electroplating

Voltage is

Potential energy difference between two points in a circuit, per unit of charge

What is an electrode?

A conductor through which electricity enters or leaves an object

Lead strips should be touching each other while connected to the power supply (during the charging of the battery)

False

In an electrolytic cell (where electrolysis is performed) e electrode which the electrons enter the solution is called___; the chemical change that occurs at this electrode is called____.

Cathode, reduction

This is an overall reaction for the lead storage battery:

PbO₂ + Pb = 2H₂SO₄ + 2H₂O

Which species is oxidized and which species gets reduced (both-during the discharged the battery) ?

Pb, PbO₂

What mass (in grams) of copper (FW = 63.5 g/mol) could be electroplated from solution of copper(II) sulfate by a current of 0.25 amperes lowing for 1 hour?

0.30 g

What is the purpose of using electroplating?

Improves appearance/hardness, resistance corrosion