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2010 USNCO Local #10: Solubility Rule

Source:

November 21, 2012

Problem Statement

Magnesium chloride dissolves in water to form:
<spanclass=′latex−bold′>(A)</span>hydrated MgCl2molecules <span class='latex-bold'>(A)</span>\hspace{.05in}\text{hydrated MgCl}_2 \text{molecules}\qquad <spanclass=′latex−bold′>(B)</span>hydrated Mg2+ions and hydrated Cl−ions<span class='latex-bold'>(B)</span>\hspace{.05in}\text{hydrated Mg}^{2+} \text{ions and hydrated Cl}^- \text{ions} \qquad <spanclass=′latex−bold′>(C)</span>hydrated Mg2+ions and hydrated Cl22−ions<span class='latex-bold'>(C)</span>\hspace{.05in}\text{hydrated Mg}^{2+} \text{ions and hydrated Cl}_2 ^{2-} \text{ions}\qquad <spanclass=′latex−bold′>(D)</span>hydrated Mg atoms and hydrated Cl2molecules<span class='latex-bold'>(D)</span>\hspace{.05in}\text{hydrated Mg atoms and hydrated Cl}_2 \text{molecules}\qquad
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