Suppose a solution contains 0.7 M Ba2+ (aq) and 0.4 M Mg2+ (aq). Fluoride ions, F- , are then slowly added to the solution.  At what [F-] will BaF2 (s) start to precipitate? (Suggestion: Write the dissolving equation and Ksp expression for BaF2 before starting this problem.) a. 2.6 x 10-7 M b. 6.7 x 10-4 M c. 5.1 x 10-4 M d. 2.5 x 10-4 M e. 9.5 x 10-4 M   Tables.pdf Periodic Table with New Elements.pdf

Suppose 20 mL of 1.5 x 10-8 M Pb(NO3)2 (aq) is mixed with 320 mL of 8.8 x 10-7 M Na2CO3 (aq). Calculate Q and determine whether a ppt of PbCO3 (s) will form. (In other words, which of the  following is entirely correct?) (Suggestion: Write the dissolving equation and Ksp expression for PbCO3 before starting this problem.) a. Q = 1.3 x 10-14 , no ppt b. Q = 1.3 x 10-14 , ppt forms c. Q = 7.3 x 10-16 , ppt forms d. Q = 7.3 x 10-16 , no ppt e. Q = 2.5 x 10-9 , ppt forms   Tables.pdf Periodic Table with New Elements.pdf

Write the correct dissolving equation for PbSO4 (s) on scratch paper, and then answer the following question. Will a ppt of PbSO4 (s) form if you mix 1.6 x 10-2 M Pb(NO3)2 (aq) with 5.5 x 10-4 M Na2SO4 (aq)? Which of the following is entirely correct?   a.  Q= 8.8 x 10-6, ppt forms b.  Q= 8.8 x 10-6, no ppt c.  Q= 1.3 x 10-8, no ppt d.  Q = 7.7 x 10-11, ppt forms e.  Q = 7.7 x 10-11, no ppt

Which of the following sparingly soluble salts would be expected to be more soluble in an acid, that is, in a solution of H+ (aq), than in pure water? 1. AgCl         2. PbI2         3. BaCO3         4. CaF2        5. NiS   a. 1 and 2 only b. 4 and 5 only c. 3 and 5 only d. 1, 2, and 4 only e. 3, 4, and 5 only   Tables.pdf Periodic Table with New Elements.pdf

According to the solubility rules, which of the following compound(s) is (are) soluble in water? 1. CdCO3       2. (NH4)2CO3        3. NiCl2        4. Pb3(PO4)2     5. Cu(NO3)2   a. 5 only b. 2, 3, and 5 only c. 3 and 5 only d. 1 and 4 only e. 2 and 3 only

Which of the following is Cupric ion? a. Cu2+ b. Cu+ c. Cu3+ d. Co+ e. Co2+

Classify NaOH as a strong acid, weak acid, strong base, or weak base, write the correct dissolving equation for NaOH on scratch paper, and then answer the following question. What is the pH of 9.1 x 10-3 M NaOH (aq)? a. -2.0 b. 2.0 c. 6.0 d. 10.0 e. 12.0

Suppose the following data are for the reaction: SO2Cl2 (g) → SO2 (g) + Cl2 (g) Time [SO2Cl2] 0 hr 0.618 M 4 0.500 10 .364 Calculate the value of the rate constant k if the reaction is first order in SO2Cl2 (g). (Suggestion: make a third column and use it to calculate the slope.) a. 0.030 hr-1 b. 0.053 hr-1 c. 0.023 hr-1 d. 0.125 hr-1 e. 0.036 hr-1   Tables.pdf Periodic Table with New Elements.pdf

An insoluble salt X2Y(s) dissolves in water as follows: X2Y(s)

According to the solubility rules, which one of the following compounds is insoluble in water?   a. MgCl2 b. Zn(NO3)2 c. K2CO3 d. Ba(C2H3O2)2 e. AgCl