The standard hydrogen electrode:

select the correct answer below:

is often used as a control in the laboratory.

is a simple, safe, and easy-to-create electrode.

involves the evolution of hydrogen gas, making it impractical for laboratory use

none of the above

is a simple, safe, and easy-to-create electrode

Explanation:

the hydrogen electrode is based on the redox half-cell:

building:

1) Platinium electrode

2) hydrogen pumping

3) acid solution [H+] = 1M

4) siphon to prevent oxygen presence

5) galvanic cell connector  

this electrode is used as the basis for standard potential tables

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