Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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3. You start with a 3.865 g sample of a salt which has the formula Cox Cly · zH₂O, where x, y, and z are
unknown. After gently heating the salt (as you did in lab with a similar compound), the mass decreased
to 2.108 g. The remaining salt was then dissolved in water to form a clear solution. After adding an
excess of aluminum metal, the solution fizzed, and a new blueish precipitate formed. After collecting
and drying the blue precipitate, its mass was measured to be 0.957 g. Determine the empirical formula
of the original compound.
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Transcribed Image Text:3. You start with a 3.865 g sample of a salt which has the formula Cox Cly · zH₂O, where x, y, and z are unknown. After gently heating the salt (as you did in lab with a similar compound), the mass decreased to 2.108 g. The remaining salt was then dissolved in water to form a clear solution. After adding an excess of aluminum metal, the solution fizzed, and a new blueish precipitate formed. After collecting and drying the blue precipitate, its mass was measured to be 0.957 g. Determine the empirical formula of the original compound.
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