A Solution May Contain NaCl,MgCl₂,and/or AlCl₃

question 10

Multiple Choice

A solution may contain NaCl,MgCl₂,and/or AlCl₃.When sodium hydroxide is added,a white precipitate forms that dissolves as more NaOH is added.Therefore,

• A)the solution definitely contains AlCl₃ and cannot contain MgCl₂.
• B)the solution contains only NaCl.
• C)the solution contains at least two of the compounds,but it cannot be determined which two are present.
• D)the solution definitely contains AlCl₃ and probably contains MgCl₂.
• E)the solution can contain only AlCl₃.

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