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Answer to Question #55743 in General Chemistry for jocelyn
Question #55743
What is the process of digestion, and why is it useful in the gravimetric determination of a precipitate?
Expert's answer
Digestion is heating the solid and the mother liquor for a certain period of time. During this process small particles dissolve and large ones grow.
Gravimetric analysis requires particles large enough to be easily washed and filtered. That is why digestion process is a common component of the gravimetric determination of precipitate.
Gravimetric analysis requires particles large enough to be easily washed and filtered. That is why digestion process is a common component of the gravimetric determination of precipitate.
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A mixture of unknown salts containing a sulfate salt has been weighed to be 1.50 g. After dissolving the solution in 500 mL of water, heating it, and adding hot barium chloride (40.0 mL, 0.500 M); the precipitate has been collected after succeeding digestion, and the mass was found to be 0.325 g. What is the percentage (by mass) of sulfur in the mixture?
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