In a 100 mL solution containing S2- ions, a selective electrode is introduced that adopts a potential of -845 mV against ENH. After the addition of 1.00 mL of 0.1 M AgNO3, the electrode acquires a potential of -839 mV. What is the concentration of sulfide ions?

Notes: Sulfide in the presence of silver precipitates. Two moles of silver react with one mole of sulfide.

Report with three significant figures in the following format 0, XXXXX

2Ag⁺ + S^2- --> ↓Ag₂S

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