Copy and complete the following sentences :
With platinum electrodyes , hydrogen is liberated at the _______ and oxygen at the _______ during the electrolysis of acidified water :

Explanation

To complete the sentences regarding the electrolysis of acidified water with platinum electrodes, we need to identify the electrodes where hydrogen and oxygen are liberated.

1. **Understanding the Electrolysis Process**: During the electrolysis of acidified water, water (H₂O) is broken down into its constituent elements, hydrogen (H₂) and oxygen (O₂). This process occurs at two electrodes: the cathode and the anode.

2. **Identifying the Cathode Reaction**: At the cathode, which is the negative electrode, reduction occurs. The hydrogen ions (H⁺) in the solution gain electrons (reduction) to form hydrogen gas (H₂). The reaction can be represented as:
\[ 2H^+ + 2e^- \rightarrow H_2 \text{ (gas)} \]
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