Which salt produces a white precipitate with | vedclass

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(B) The reaction of sodium thiosulphate $(Na_2S_2O_3)$ with silver nitrate $(AgNO_3)$ initially forms a white precipitate of silver thiosulphate $(Ag_

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$Na_2S_2O_3$

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(B) The reaction of sodium thiosulphate $(Na_2S_2O_3)$ with silver nitrate $(AgNO_3)$ initially forms a white precipitate of silver thiosulphate $(Ag_2S_2O_3)$: $Na_2S_2O_3 + 2AgNO_3 	o Ag_2S_2O_{3(white \ ppt)} + 2NaNO_3$ On standing,the white precipitate of silver thiosulphate decomposes in the presence of water to form black silver sulphide $(Ag_2S)$: $Ag_2S_2O_{3(white \ ppt)} + H_2O 	o Ag_2S_{(black \ ppt)} + H_2SO_4$

Which salt produces a white precipitate with $AgNO_3$ solution,which becomes black on standing?

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