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September 19, 2014

Homework Help: Chemistry

Posted by Lauren on Tuesday, February 19, 2008 at 3:53am.

Washing soda is added to hard water to allow soap to lather.
A certain brand of washing soda contains partially hydrated
sodium carbonate solid. A 0.300 g sample completely reacts
with 20.0 mL of 0.250 M hydrochloric acid.
a What mass of sodium carbonate was present?
b Calculate the percentage by mass of sodium carbonate in
the washing soda.

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