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I need help with - Surface Chemistry - NEET

Which mixture of the solution will lead to the formation of negatively charged colloidal [AgI]I^- sol. ?

  • Option 1)

    50 mL of 1 M AgNO_3 + 50 mL of 1.5 M KI

  • Option 2)

    50 mL of 1 M AgNO_3 + 50 mL of 2 M KI

  • Option 3)

    50 mL of 2 M AgNO_3 + 50 mL of 1.5 M KI

  • Option 4)

    50 mL of 0.1 M AgNO_3 + 50 mL of 0.1 M KI

Answers (1)
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P Plabita

Option 2

AgNO_3 + KI \longrightarrow AgI + KNO_3

AgI + KI \longrightarrow [AgI]I^- + K^+

                    Negatively charged colloidal

1 M \;AgNO_3 + 2 M \;KI \longrightarrow 1 M\;[AgI]I^- + KNO_3+ K^+

\Rightarrow need 2 mol of I^\circleddash

 


Option 1)

50 mL of 1 M AgNO_3 + 50 mL of 1.5 M KI

Option 2)

50 mL of 1 M AgNO_3 + 50 mL of 2 M KI

Option 3)

50 mL of 2 M AgNO_3 + 50 mL of 1.5 M KI

Option 4)

50 mL of 0.1 M AgNO_3 + 50 mL of 0.1 M KI

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