Identify the product of the given reaction:
(a)`AgBr + 2Na_(2)S_(2) O_(3) rarr " " (b) H_(2)SO_(4) ("dil") + Na_(2)S_(2)O_(3) rarr " " (c) H_(2)SO_(4) ("conc.") + Na_(2)S_(2)O_(3)`

Explanation

Let's solve the question step by step.

### Step 1: Reaction of AgBr with Na2S2O3
The first reaction is:
\[ \text{AgBr} + 2 \text{Na}_2\text{S}_2\text{O}_3 \rightarrow ? \]

- **Explanation**: When silver bromide (AgBr) reacts with sodium thiosulfate (Na2S2O3), a complex is formed along with sodium bromide (NaBr). The product formed is sodium bis-thiosulfate-arginate complex, represented as \( \text{Na}_3[\text{Ag}(\text{S}_2\text{O}_3)_2] \) and sodium bromide (NaBr).

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