CHEM122-Discussion Worksheet 11-keys PDF

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Discussion Worksheet 11 Name: __________________________ ID: _______________________ ! 1. Calculate the molar solubility of barium fluoride in each liquid or solution. a. pure water b. 0.10 M Ba(NO3)2 c. 0.15 M NaF Given, Ksp (BaF2)= 2.45 x 10-5

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2. Calculate the molar solubility of calcium hydroxide in a solution buffered at each pH. a. pH = 4 b. pH = 7 c. pH = 9 Given, Ksp (Ca(OH)2)= 4.68 x 10-6

3. A solution containing sodium fluoride is mixed with one containing calcium nitrate to form a solution that is 0.015 M in NaF and 0.010 M in Ca(NO3)2. Does a precipitate form in the mixed solution? If so, identify the precipitate. Ksp (CaF2)= 1.46 x 10-10

4. A solution is made of 1.1 x 10-3 M in Zn(NO3)2 and 0.150 M in NH3. After the solution reaches equilibrium, what concentration of Zn2+(aq) remains? Given, Kf (Zn(NH3)42+) = 2.8 x 109...