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Solutions of sodium thiosulfate are used to dissolve unexposed AgBr ( Ksp= 5.0E-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.00L of 0.500M Na2S2O3? Ag+ reacts with S2O3 2- to form a complex ion with a overall k value of 2.9E13

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