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Which choice is the correct answer to this chemistry problem?

When a solution of ammonium carbonate and magnesium chloride are mixed, what precipitate if any is formed?

Select one:

a. Magnsium carbonate, MgCO3 (s)

b. Ammonium chloride, NH4Cl (s)

c. Magnsium carbonate, MgCO3 (s) and Ammonium chloride, NH4Cl (s)

d. No precipitate

1 Answer

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  • 1 month ago

    Remember most Carbonates are insoluble, and most chlorides are soluble. 

    So when you mix ammonium carbonate and magnesium chloride, the insoluble product is magnesium carbonate. The ammonium ion and the chloride ion remain in solution. 

    (NH4)2CO3(aq) + MgCl2(aq) = 2NH2Cl (aq) + MgCO3(s) . 

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