The principle behind removing stains left by silver nitrate

2009-03-02View Original

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In the titration experiment, the stains left by silver nitrate are removed using KI-I2. What is the principle behind this? What is the principle behind removing AgCl using sodium thiosulfate?

Reply #22009-03-03

Silver nitrate reacts with I- ions to form silver iodide precipitate; as for the latter reaction, it’s not clear, but it is likely that silver sulfide is formed

Reply #32009-03-03

Silver chloride is soluble in sodium thiosulfate, forming a complex of thiosulfate and silver.

Reply #42009-03-07

Silver nitrate reacts with I- ions to produce silver iodide precipitate, while silver chloride is soluble in sodium thiosulfate, forming a complex of thiosulfate and silver

Reply #52009-04-22

In sodium thiosulfate solution, it forms Ag(S2O3)2]3−

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The principle behind removing stains left by silver nitrate

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