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70-Sol-Products

# 70-Sol-Products - PbCl 2(s Pb 2(aq 2Cl 1 –(aq Ksp for...

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GCHEM II LAB SOLUBILITY PRODUCTS CONCEPT PROBLEMS (Use Appendix D page 1127 text book to find Solubility Products Constants) 1. A saturated solution of AgCl at 20.0 o C was found at equilibrium to be 1.35 X 10 -5 M in Ag + . Assume that AgCl dissociates to form Ag +1 and Cl -1 ions , what is the Ksp for AgCl ? R eaction I nitial (moles/L) C hange (+/–) E quil or Comp 2. What is the solubility (moles/Liter and grams/Liter) of calcite (CaCO 3 ) in ocean water at 10.0 o C ? R eaction I nitial (moles/L) C hange (+/–) E quil or Comp 3. a) Calculate solubility (grams/L) of Fe(OH) 2 in water at 25 o C. R eaction I nitial (moles/L) C hange (+/–) E quil or Comp 3. b) What is solubility (grams/L) of Fe (OH)2 if 0.02 M NaOH common ion is added ? R eaction I nitial (moles/L) C hange (+/–) E quil or Comp

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Unformatted text preview: PbCl 2 (s) Pb 2+ (aq) + 2Cl 1 – (aq) Ksp for PbCl 2 = 1.7 x 10 – 5 ION PRODUCTS (IP) = [Pb 2 + ]*[Cl 1 – ] 2 at any concentrations of Pb 2+ and Cl 1 – Solid (ppt ) IP (larger than) {Ksp } (smaller than ) IP Solution (ions) 4. You mix 100.0 mls of 0.0200 M BaCl 2 with 50.0 mls of 0.0300 M Na 2 SO 4 . Will BaSO 4 ppt. ? 5. Student mixes 0.0075 moles NaCl with 0.095 moles Pb(NO 3 ) 2 in 500.0 mls of water. Will PbCl 2 ppt ? 6. What precipitate forms by mixing 50.0 mls of 0.0001 M NaCl with 50.0 mls 0.000001 M AgNO 3 ? 7. Will a precipitate of Mg(OH) 2 form when 25.0 mls of 0.010 M NaOH is combined with 75.0 mls of a 0.10 M solution of MgCl 2 ? What is pH of the solution ? jpechunf112005...
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