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15.2 Exercise 14

Avg difficulty 2.5

A roll of 35-mm black and white photographic film contains about 0.27 g of unexposed AgBr before developing. What mass of Na2S2O3·5H2O (sodium thiosulfate pentahydrate or hypo) in 1.0 L of fixer is required to dissolve the AgBr as Ag(S2O3)23−\text{Ag} \left(\text{S}_{2} \text{O}_{3}\right)_{2} ^{\text{3}−} (Kf = 4.7 ×\times 1013)?

OpenStax Chemistry 2e, 15.2 Lewis Acids and Bases, exercise 14

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Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.