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National and Regional Contests
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USA Physics and Chemistry Contests
National Chemistry Olympiad
2010 National Chemistry Olympiad
10
10
Part of
2010 National Chemistry Olympiad
Problems
(1)
2010 USNCO Local #10: Solubility Rule
Source:
11/21/2012
Magnesium chloride dissolves in water to form:
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hydrated MgCl
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<span class='latex-bold'>(A)</span>\hspace{.05in}\text{hydrated MgCl}_2 \text{molecules}\qquad
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hydrated MgCl
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hydrated Mg
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ions and hydrated Cl
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ions
<span class='latex-bold'>(B)</span>\hspace{.05in}\text{hydrated Mg}^{2+} \text{ions and hydrated Cl}^- \text{ions} \qquad
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hydrated Mg
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hydrated Mg
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ions and hydrated Cl
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−
ions
<span class='latex-bold'>(C)</span>\hspace{.05in}\text{hydrated Mg}^{2+} \text{ions and hydrated Cl}_2 ^{2-} \text{ions}\qquad
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C
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hydrated Mg
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hydrated Mg atoms and hydrated Cl
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<span class='latex-bold'>(D)</span>\hspace{.05in}\text{hydrated Mg atoms and hydrated Cl}_2 \text{molecules}\qquad
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hydrated Mg atoms and hydrated Cl
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