Question

What happens if h2so4 is not added in electrolysis of water

Answer 1

Pure water is a very poor electrical conductor because there are few ions in it; only 10⁻⁷ mol/L of H⁺ and same concentration of OH⁻. Rate of electrolysis depends on electrical current that trespass electrochemical cell, so very low current means unnoticeable production of oxygen and hydrogen.

Electrolyte must be added to the solution to raise conductivity of the solution and then increasing electrolysis rate. Sulfuric acid is not a bad choice, but is risky due to its acidity. Same for sodium hydroxide or another strong base that are also harmful. Thus, salts are the best candidates for electrolytes, but any anion or cation that can be oxidized or reduced must be avoided (after all, you want only water reacting). This rules out acetate, nitrate, nitrite, chloride, bromide, iodide and most metals except alkaline and alkaline earth metals. Electrolyte must also be nontoxic, safe, easy to obtain and cheap. The best choice is sodium sulfate.

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Answer 2

Hey Mate,

Here Is Your Answer

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