A Student Is Given a Sample in Lab That Contains

question 135

Multiple Choice

A student is given a sample in lab that contains one of the ions listed below.After adding a few drops of AgNO₃ solution to a portion of the unknown sample,the student observed a grayish precipitate.After adding a few drops of Mg(NO₃) ₂ solution to another portion of the unknown sample,the student got a black precipitate.Based on these observations,what is the only possible ion in this student's sample?

• A)Cl^-
• B)F^-
• C)C₂H₃O₂^-
• D)S^2-
• E)SO₄^2-

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