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A 2.892 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was...

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Chemistry

A 2.892 gram sample containing an unknown amount of arsenictrichloride and the rest inerts was dissolved into a NaHCO3 and HClaqueous solution. To this solution was added 1.850 grams of KI and50.00 mL of a 0.00937 M KIO3 solution. The excess I3

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4.0 Ratings (773 Votes)
Start by writing down reaction equations to try to understand what is happening AsCl3 is dissolved in aqueous HCl to inhibit the formation and precipitation of AsOH3 addition of HCl drives equilibrium to the left AsCl3 H2O AsOH3 HCl eqn 1 Addition of KI then forms AsI3 It think this is quite soluble so perhaps the I3 ion forms but does not dissociate into I AsCl3 3KIaqAsI3 3KClaq eqn 2 Assuming that KI was    See Answer
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