If an aqueous solution of hno3 is electrolyzed for 13.00 min at a steady current of 1.45 a, what volume of h2 (g) at 25.0oc and 1.03 atm will be collected at the cathode? vol h2 (l)

0.14 Liters

Explanation:

where Q= quantity of electricity in coloumbs

I = current in amperes = 1.45 A

t= time in seconds = 13 min=

of electricity deposits  1 mole of

1131 C of electricity deposits = of

According to the ideal gas equation:'

P = Pressure of the gas = 1.03 atm

V= Volume of the gas = ?

T= Temperature of the gas = 25°C = 298 K       (0°C = 273 K)

R= Gas constant = 0.0821 atmL/K mol

n=  moles of gas=

Thus the volume of hydrogen gas at and 1.03 atm will be 0.14 Liters.

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