Extraction of Metals - Result Question 76
####79. Write the balanced chemical equation for developing photographic films.
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Solution:
- The common photographic film is coated with $AgBr$ and during developing of photographic film, the unreacted $AgBr$ is removed by $Na _2 S _2 O _3$ as
$$ AgBr+2 Na _2 S _2 O _3 \longrightarrow Na _3\left[Ag\left(S _2 O _3\right) _2\right]+NaBr $$
