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A 10.00-mL sample of Ba(OH)2 solution was pipetted into a beaker. An excess of aqueous sodium...

A 10.00-mL sample of Ba(OH)2 solution was pipetted into a beaker. An excess of aqueous
sodium phosphate (the precipitating reagent) was added. The resulting precipitate was
filtered and dried. The mass of the precipitate was 0.2974 g.

(a) Write a balanced equation for the precipitation reaction.
(b) Calculate the molarity of the Ba(OH)2 solution from the mass of the precipitate.

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