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A sample may contain any or all of the following ions: Hg22+, Ba2+, Mn2+. No precipitate formed...

Question:

A sample may contain any or all of the following ions: Hg22+, Ba2+, Mn2+. No precipitate formed when an aqueous solution of NaCl or Na2SO4 was added to the sample solution. A precipitate formed when the sample solution was made basic with NaOH. Which ion or ions are present in the sample solution?

Solubility Rules:

While all ionic compounds are soluble to some degree, some very sparingly soluble whiles are orders of magnitude more soluble. Those only sparingly soluble are in general called insoluble salts while those much more soluble are generally referred to as soluble salts.

Answer and Explanation: 1

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The sample contains {eq}Mn^{2+} {/eq} only.


  • {eq}Hg_2Cl_2 {/eq} is an insoluble salt. Since no precipitation formed upon addition of NaCl...

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Solubility of Common Salts: Predicting Reaction Outcomes

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Chapter 12 / Lesson 4
42K

Learn whether or not salt is soluble in water. Understand what happens when salt dissolves in water and predict the NaCl solubility by using a salt solubility table.


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