Question

How long will it take to collect 1.0 L of H2(g) at STP in the electrolysis of 2.0 M HCl with a current of
4.25 A?
a. 15 min
b. 34 min
c. 2.8 hr
d. 11 hr

Answer 1

Convert 1.0 L H2 to grams H2 and convert that to coulombs required remembering that 96,485 coulombs will release 1 gram equivalent weight of H2. Then amperes x time(seconds) = coulombs. Solve for time in seconds.