To an aqueous solution of AgNO_3,some NaOH_{( | vedclass

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Question

(D) The reaction between $AgNO_3$ and $NaOH$ produces a brown precipitate of silver oxide: $2AgNO_{3(aq)} + 2NaOH_{(aq)} 	o Ag_2O_{(s)} + H_2O_{(l)}

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$Ag$

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(D) The reaction between $AgNO_3$ and $NaOH$ produces a brown precipitate of silver oxide: $2AgNO_{3(aq)} + 2NaOH_{(aq)} 	o Ag_2O_{(s)} + H_2O_{(l)} + 2NaNO_{3(aq)}$ (Brown ppt.) When $H_2O_2$ is added to this brown precipitate,it acts as a reducing agent and reduces $Ag_2O$ to metallic silver,which appears as a black precipitate: $Ag_2O_{(s)} + H_2O_{2(aq)} 	o 2Ag_{(s)} + H_2O_{(l)} + O_{2(g)}$ (Black ppt.) Therefore,the black precipitate is finely divided metallic silver $(Ag)$.

To an aqueous solution of $AgNO_3$,some $NaOH_{(aq)}$ is added until a brown precipitate is obtained. To this,$H_2O_2$ is added dropwise. The precipitate turns black with the evolution of $O_2$. The black precipitate is:

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