ime Limit: 1:00:00 Time Left:0:49:06 Amanda Moore: Attempt 1 Questions In the el
ID: 1026137 • Letter: I
Question
ime Limit: 1:00:00 Time Left:0:49:06 Amanda Moore: Attempt 1 Questions In the electrolysis of an acid solution, oxygen can be produced by the following half-reaction 4 of 5 questions saved 2H20(0 02() + 4H+(ad + 4e- Page 1: How much time (min) is required to collect 10.3 L of oxygen, using a current of 5.01 A, if the gas is collected over water at 22.0°C and the total pressure is 102.9 kPa? Assume that the water is already saturated with axygen so no more dissolves. Assume Protalgas) PIO2)PH20. and that the correction for column height is negligible. The vapor pressure of water at 22.0 C is 2.643 kPa, F- 96485 C/mol e. and R-8.314 kPa-Lmol1.K1 a d Enter your final answer for the time required in units of minutes. Your Answer Question 4 Saved acBook A a6 Fa F7 F5 F6Explanation / Answer
V= 10.3 L
T= 22C= 22+273 = 295K
R= 8.314 Kpa-L/moleK
vapour pressure of water at 22C= 2.643 KPa
Pressure of mixture = 102.9 KPa
pressure of Dry O2 gas= 102.9-2.643= 100.257 KPa
Ideal gas equation
PV=nRT
molar mass of O2 = 32 grams
PV= mass/molar mass xRT
mass= PVxmolar mass/RT
mass = 100.257 x 10.3 x32/8.314x295= 13.47 grams
w= 13.47 grams
c= 5.01 A
F= 96485C
Molar mass of O2= 32 grams
valency of O2 = 4
according to faradays law
W= MCt/ZF
t= WZF/Mc = 13.47x4x96485/32x5.01= 32426.47seconds
time = 32426.47seconds.
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