Which of the following colloids are formed wh | vedclass

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(A) The reaction between arsenious oxide $(As_2O_3)$ and hydrogen sulphide $(H_2S)$ is a double decomposition reaction: $As_2O_3 + 3H_2S \rightarrow A

Vedclass · Accepted Answer

$As_2S_3$

Vedclass · Answer

(A) The reaction between arsenious oxide $(As_2O_3)$ and hydrogen sulphide $(H_2S)$ is a double decomposition reaction: $As_2O_3 + 3H_2S \rightarrow As_2S_3 (sol) + 3H_2O$. This results in the formation of an $As_2S_3$ sol,which is a negatively charged colloid. The negative charge is due to the preferential adsorption of $S^{2-}$ ions on the surface of the colloidal particles.

Which of the following colloids are formed when hydrogen sulphide gas is passed through a cold solution of arsenious oxide?

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