To a Concentrated Buffer of PH 4

question 58

Multiple Choice

To a concentrated buffer of pH 4.0 is added an equal volume of an aqueous solution that is 0.020 M in Cr³⁺,Cd²⁺ and Al³⁺.The expected precipitate would consist of ________.

• A)Al(O
• H)₃
• B)Al(O
• H)₃ and Cr(O
• H)₃
• C)Cd(O
• H)₂
• D)Cd(O
• H)₂ and Cr(O
• H)₃
• E)Cd(O
• H)₂,Cr(O
• H)₃ and Al(O
• H)₃

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