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2 July, 15:00

A sample of solution has a mixture of 0.01 M Aluminum Chloride and 0.05 M Magnesium Chloride. What is the molarity of Silver that is required to precipitate all the chloride ions present in the solution?

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  1. 2 July, 16:39
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    AlCl₃ ⇒Al⁺³ + 3Cl⁻¹

    .01M 3 x. 01 M

    So. 01 M AlCl₃ will give 3 x. 01 M Cl⁻¹

    MgCl₂ ⇒ Mg⁺² + 2Cl⁻¹

    .05 M 2 x. 05M

    .05M MgCl₂ will give 2 x. 05 M Cl⁻¹

    Total Cl⁻¹ formed = 3 x. 01 + 2 x. 05 M

    =.03 +.1 M

    =.13 M

    AgCl ⇒ Ag⁺ + Cl⁻¹

    So AgCl required =.13 M. to precipitate all chloride ions.
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