During electrolysis of acidfied water , oxygen gas is produced at ________ .

Explanation

**Step-by-Step Solution:**

1. **Understanding Electrolysis**: Electrolysis is a chemical process that uses electricity to break down compounds. In the case of acidified water, the water is mixed with an acid (like sulfuric acid) to increase the conductivity.

2. **Identifying the Electrodes**: In electrolysis, there are two electrodes: the anode (positive electrode) and the cathode (negative electrode). The anode attracts anions (negatively charged ions), while the cathode attracts cations (positively charged ions).

3. **Analyzing the Reaction in Acidified Water**: When acidified water undergoes electrolysis, water (H₂O) dissociates into hydrogen ions (H⁺) and hydroxide ions (OH⁻). The reaction can be represented as:
- H₂O ⇌ H⁺ + OH⁻
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