Write the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the anode of a voltaic cell. express your answer as an ionic half-reaction. identify all of the phases in your answer.

The half cell reaction when it used as an anode

H₂(g) → 2 H⁺ + 2 e⁻

Explanation:

Standard hydrogen electrode used as  reference electrode & acts as an cathode as well as anode half cell.

The half cell reaction when it used as an anode

H₂(g) → 2 H⁺ + 2 e⁻

(Pressure should be 1 bar , temperature 273 k and concentration of HCl = 1 Molar)

Cell representation

H₂(g) , H⁺(1 M)

The standard electrode potential i.e oxidation as well as reduction = 0.00 V

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.