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How many moles of solid sodium fluoride should be added to 1.0 L of a saturated...

How many moles of solid sodium fluoride should be added to 1.0 L of a saturated solution of barium fluoride, BaF2, at 25 ∘C to raise the fluoride concentration to 0.029 mol/L ? Express your answer to two significant figures and include the appropriate units.

What mass of BaF2 precipitates? You may ignore the hydrolysis of fluoride ion. [Hint: This first part of this problem is most easily solved by first writing down an electroneutrality condition. See pages 721-722 in the textbook.] Express your answer to two significant figures and include the appropriate units.

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