In the standardization of `Na_(2)S_(2)O_(3)` using `K_(2)Cr_(2)O_(7)` by iodometry, the equivalent weight of `K_(2)Cr_(2)O_7` is

Explanation

To find the equivalent weight of potassium dichromate (K₂Cr₂O₇) in the standardization of sodium thiosulfate (Na₂S₂O₃) by iodometry, we can follow these steps:

### Step 1: Write the Reaction
The first step is to write the balanced chemical reaction between potassium dichromate and sodium thiosulfate. In this reaction, potassium dichromate (K₂Cr₂O₇) acts as an oxidizing agent and gets reduced.

### Step 2: Determine the Oxidation State of Chromium
In K₂Cr₂O₇, we need to find the oxidation state of chromium (Cr). The oxidation state can be calculated as follows:
- Let the oxidation state of Cr be x.
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