One of the half-reactions for the electrolysis of water is 2 H2 O(l) ⟶O2(g)+4 H^+(a q)+4 e^- If

step 1 Half reaction for electrolysis of 2 .H2O liquid forms O2 gas plus 4H plus equest plus 4 electron

One of the half-reactions for the electrolysis of water is 2...

One of the half-reactions for the electrolysis of water is $$ 2 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{O}_{2}(g)+4 \mathrm{H}^{+}(a q)+4 e^{-} $$ If $0.076 \mathrm{~L}$ of $\mathrm{O}_{2}$ is collected at $25^{\circ} \mathrm{C}$ and $755 \mathrm{mmHg}$, how many moles of electrons had to pass through the solution?

One of the half-reactions for the electrolysis of water is
$$
2 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{O}_{2}(g)+4 \mathrm{H}^{+}(a q)+4 e^{-}
$$
If $0.076 \mathrm{~L}$ of $\mathrm{O}_{2}$ is collected at $25^{\circ} \mathrm{C}$ and $755 \mathrm{mmHg}$, how many moles of electrons had to pass through the solution?

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Key Concepts

Electrolysis Half-Reaction

Electrolysis involves the use of electrical energy to drive a non-spontaneous chemical reaction. In the context of water electrolysis, the half-reaction for oxygen production describes how water is oxidized to form oxygen gas, protons, and electrons, with the electrons representing the transfer of charge during the process.

Ideal Gas Law

This fundamental principle in chemistry relates the pressure, volume, temperature, and number of moles of a gas (PV = nRT) and is used to convert measured gas volumes under non-standard conditions into moles. It allows for the quantification of gas produced or consumed in a chemical reaction by accounting for changes in thermodynamic conditions.

Stoichiometry of Electron Transfer

Stoichiometry is used to relate the moles of reactants and products in a chemical reaction. In redox processes like water electrolysis, stoichiometry specifically connects the moles of electrons transferred to the moles of a product formed, such as oxygen. This concept is crucial for calculating the total number of electrons needed based on the amount of gas produced.

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