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1. A solution of 0.20 M Pb(NO3)2 is mixed with a solution of 0.020 M HCI. When equal volumes of the two solutions are mixed together will a precipitate result? A. yes B. no 2. CaC2O4 should be most soluble in A acid B. base C. water 3. Pb2+ salts are most soluble in water B XS HCI C. XS HI D. XS K2C2O4 E. XS NaOH 4. How might one shift this equilibrium to the left? AgCl(s) + 2NH3 == Ag(NH3)2 + Cl A. Add NH3 B. remove AgCl(s) C. Add NaNO3 D. Add HNO3 E. none of these 5. I wish to dissolve a solid containing Ag2SO4(s). A solution containing a high concentration of H3O+ (acid) should do it. A. true B. false 6. I wish to precipitate PbCl2 from a 0.2 M Pb2+ solution? How much chloride is required to precipitate all of it. A. 0.2 M Cl B. 0.4 M Cl C. 0.8 M Cl D. 8 M Cl 7. What is the solubility of Ni(OH)2 in a 0.10 M OH` solution? A. 2.0x10-14 M B. 2.0x10-¹³ M C. 1.3x10 M D. none 8. Which is more soluble, PbI2 or PbSO4? A. Pbl2 B. PbSO4 9. The ancient Romans added CaSO4 to wine. What did this accomplish? A. clarify the wine. B. added flavor. C. clarified and removed dissolved lead. 10. The "combined method" for solving multiple equilibria can be used when K is large for the first step and small for the second step. A. true B. false 11. Which is expected to be the most soluble in acid? A. Pbl2 B. PbCO3 C. PbCl2 12. The Ksp* eqn for FeS(s) = Fe2++S²- is correct. A. true B. false 13. How much water is required to dissolve 1.00 g of PbCl2?

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