Question
Asked Mar 29, 2019

Solid zinc chloride is slowly added to 150 mL of a 0.326 M potassium sulfide solution until the concentration of zinc ion is 0.0577 M. The percent of sulfide ion remaining in solution is

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Step 1

When solid zinc chloride is added to potassium sulphide solution, the reaction that takes place is ;

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Step 2

On the reactant side,i.e., before the reaction, the concentration of sulphide ions is same as the concentration of potassium sulphide, since potassium sulphide is a salt (and hence a strong electrolyte), and dissociates such as the smount of sulphide ions is same as the amount of potassium sulphide.

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Step 3

When the reaction proceeds, the sulphide ions present in the product is from ZnS. The concentration of zinc ions is mentioned in the product, which is the same a...

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