In this experiment what type of chemical reaction is occurring to produce H_2 at

Question

In this experiment what type of chemical reaction is occurring to produce H_2 at the cathode What process is occurring at the anode Why is H_2SO_4 present in the electrolysis solution When an aqueous NaCl solution is electrolyzed, how many faradays need to he transferred at the anode to release 0.100 mol of Cl_2 gas 2 Cl^- (aq) right arrow Cl_2(g) + 2 e^- How long must a current of 0.50 A pass through a sulfuric acid solution to liberate 0.200 L of H_2 gas at STP A current of 3.00 A was passed through a solution of sulfuric acid for 20 minutes. The hydrogen produced was collected at 20 degree C and 640.0 mm Hg and was found to occupy a volume of 534 mL. How many coulombs (C = A x s) were passed through the solution How many electrons were passed through the solution How many moles of H_2 were produced What is the value of Avogadro's number, N

Explanation / Answer

In the reaction 2Cl-(aq) -> Cl2(g) + 2e- when 0.1 mol of Cl2 is released, the amount of electrons released is:

0.1 x 2 = 0.2 mol.

The Faraday constant, denoted by the symbol F and named after Michael Faraday, is the magnitude of electric charge per mole of electrons. Therefore the charge transferred to the anode is the amount carried by 0.2 mol of electrons i.e. 0.2 F (answer).

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