How Many Moles of NaF Must Be Dissolved in 1 $\circ$

question 88

Multiple Choice

How many moles of NaF must be dissolved in 1.00 liter of a saturated solution of PbF₂ at 25 ^$\circ$ C to reduce the [Pb²⁺] to 1.0 * 10^-6 M The K_sp for PbF₂ at 25 ^$\circ$ C is 4.0 * 10^-8.

• A) 0.20 mol
• B) 0.30 mol
• C) 0.40 mol
• D) 0.50 mol
• E) None of the above

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