Question

In: Chemistry

If an aqueous solution of HNO3 is electrolyzed for 38.00 min at a steady current of...

If an aqueous solution of HNO3 is electrolyzed for 38.00 min at a steady current of 1.29 A, what volume of H2 (g) at 25.0oC and 0.99 atm will be collected at the cathode? vol H2 (L) =

Expert Solution

Q= I *t

= 1.29*38*60

= 2941.19columbs

2 H^+ + 2e^-1--------------------> H2

2*96500 COLUMBS OF ELECTRICITY IS PASSED ---------------------------------------------- 22.4lit of H₂ gas

2941.19 columbs of electricity passed ------------------------------------------------------------ ?

= 2941.19*22.4/(2*965000

= 0.034 litres of HYDROGEN GAS

P1=1 atm

V1= 0.034litres

T1= 273K

P2=0.99atm

T2= 298K

V2= ?

P1V1/T1= P2V2/T2

1*0.034/273=0.99*V2/298

V₂= 0.037litres

queen_honey_blossom answered 2 years ago

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