What [PO43-] is required to just begin precipitation of Zn3(PO4)2 (s) from a solution of 0.2 M Zn2+ (aq)? (Suggestion: Write the dissolving equation and Ksp expression for Zn3(PO4)2 before starting this problem.) a. 1.1 x 10 -30 M b. 2.1 x 10 -16 M c. 1.1 x 10 -15 M d. 5.3 x 10 -16 M e. 1.0 x 10 -16 M   Tables.pdf Periodic Table with New Elements.pdf

Use your CHM-132 Tables to calculate the Kb of ClO- .   a. 3.0 x 10-8 b. 3.3 x 10-7 c. 3.0 x 106 d. 3.0 x 10-22 e.  3.3 x 107

Determine the coordination number of Fe in the complex [Fe(en)2Cl2]+ , and then answer the following  question. What is the most likely molecular geometry of [Fe(en)2Cl2]+ ? a. linear b. tetrahedral c. square planar d. octahedral e. trigonal planar   Tables.pdf Periodic Table with New Elements.pdf

What is the solubility (in mol/L) of AgCl(s) in a solution that contains 0.05 M AgNO3 (aq)? (Suggestion: Write the dissolving equation and Ksp expression for AgCl before starting this problem.) a. 3.6 x 10-9 mol/L b. 1.3 x 10-5 mol/L c. 3.2 x 10-20 mol/L d. 2.8 x 108 mol/L  e. 143 mol/L   Tables.pdf Periodic Table with New Elements.pdf

Consider the following data for the reaction: A → products [A] Rate 0.02 M 6.91 x 10-4 M/min 0.05 1.73 x 10-3 0.12 4.15 x 10-3 What is the rate law? (Suggestion: first determine the order by the ratio technique.) a. Rate = k[A] b. Rate = k/[A] c. Rate = k d. Rate = k[A]2 e. Rate = k/[A]2   Tables.pdf Periodic Table with New Elements.pdf

What is the solubility of BiI3 (s) (in g/L) in a solution that contains 0.24 M Bi3+ (aq)? a. 8.8 x 10-4 g/L b. 2.9 x 10-4 g/L c. 6.6 x 10-16 g/L d. 5.0 x 10-7 g/L e. 2.0 x 10-15 g/L   Tables.pdf Periodic Table with New Elements.pdf

A buffer is prepared by dissolving HF and NaF in water.  Which of the following is the net ionic equation describing how the buffer neutralizes an acid (H+ ) that is added to the buffer?  a. H+ + OH- → H2Ob. H+ + NaF → Na+ + HF  c. H+ + HF → H2F+d. H+ + H2O → H3O+e. H+ + F- → HF

Look up the Ka value of each acid below in your CHM-132 Tables, and then answer the following question. Which of the following is the strongest acid?   a. NH4+ b. HCHO2 c. HC2H3O2 d. HClO e. HCN

What pH is required to just begin precipitating Ca(OH)2 (s) from a solution containing 0.005 M Ca2+(aq)? (Suggestion: Write the dissolving equation and Ksp expression for Ca(OH)2 before starting this problem.) a. 10.4 b. 1.8 c. 3.6 d. 12.2 e. 11.7   Tables.pdf Periodic Table with New Elements.pdf

4 PH3 (g) ➝ P4(s) + 6 H2 (g) The reaction is first order in PH3 (g) and has a rate constant k of 6.28 x 10-2 s-1 . What is the half-life, t½? a. 15.9 s b. 4.35 x 10-2 s c. 9.06 x 10-2 s d. 35.0 s e. 11.0 s   Tables.pdf Periodic Table with New Elements.pdf