In the ionization reaction of pyridine, C5H5N (aq) + H₂O (1) = C5H5NH+ (aq) + OH¯ (aq) the equilibrium concentrations of pyridine, C₂HÃN, pyridinium, C5H5NH+, and hydroxide OH, are 2.00 M, 5.83 × 10-5 M, and 5.83 × 10-5 M, respectively. Calculate the value of K. 1.70 × 10-⁹ 5.83 x 10-5 5.88 × 108 5.00 x 10-1

The dissociation expression of a dilute aqueous solution of hydrochloric acid is shown as: HCl(aq)      +     H2O(l) -> Cl-(aq)        +     H3O+(aq) True                                                                  False

The ionization constant of lactic acid, CH,CH(OH)CO,H, an acid found in the blood after strenuous exercise, is 1.36 x 10-4. What is the concentration of hydronium ion in the solution of 0.102 M lactic acid? CH;CH(OH)CO,H (aq) + H,O (1) → H;O• (aq) + CH;CH(OH)CO, (aq) O 0.00372 M O 0.0165 M O 0.00549 M O 0.227 M

Formic acid, HCOOH, ionizes in water according to the following equation. The equilibrium constant is K= 1.8 x 10-4. HCOOH(aq) + H,O(1) = HCOO (aq) +H,O*(aq) Calculate the equilibrium concentration of H3O* in a 0.985 Msolution. M

Write the equilibrium constant expression for this reaction: H;PO,(aq) - 3 H (aq)+PO (aq) ?

Predict the effect of adding HCL aqueous to the equilibrium reaction 

Write the equation for the equilibrium constant (K) of the reaction studied in this exercise.  2CrO4 2−(aq)+2H+(aq)⇌Cr2O7 2−(aq)+H2O(l)

Metal sulfides are prepared by bubbling hydrogen sulfide gas, H, S, through an aqueous solution containing the metal ion, and then adjusting the pH. When the solution is saturated with H, S, which occurs when [H,S] = 0.100 M, the equilibrium shown is established. H, S(aq) + 2 H, O(1) = s²-(aq) + 2H,O*(aq) Keq = 1.1 x 10-20 An aqueous solution containing 0.0521 M Pb2+ and 0.0521 M Ag* is saturated with H, S. Above what concentration of S²- will PbS precipitate? The Kyp of PbS is 8.9 × 10-29. [s²-] = M Above what concentration of S²- will Ag,S precipitate? The Kşp of Ag,S is 3.3 × 10-50. [s²-] = M If the pH of the solution is adjusted to 2.32, which species will precipitate from the saturated H, S solution? both PbS and Ag,S PbS neither species O Ag,S

Metal sulfides are prepared by bubbling hydrogen sulfide gas, H, S, through an aqueous solution containing the metal ion, and then adjusting the pH. When the solution is saturated with H,S, which occurs when [H, S] = 0.100 M, the equilibrium shown is established. H, S(aq) + 2 H, O(1) = s²-(aq) + 2 H,O*(aq) Keq = 1.1 × 10-20 An aqueous solution containing 0.0117 M Pb2+ and 0.0117 M Ag+ is saturated with H, S. Above what concentration of S2- will PbS precipitate? The Kp of PbS is 8.9 × 10-29. [s-] = M %3D Above what concentration of S2- will Ag, S precipitate? The Ksp of Ag, S is 3.3 x 10-50. [s-] = M %3D If the pH of the solution is adjusted to 2.73, which species will precipitate from the saturated H, S solution? neither species PbS both PbS and Ag, S Ag,S

Metal sulfides are prepared by bubbling hydrogen sulfide gas, H, S, through an aqueous solution containing the metal ion, and then adjusting the pH. When the solution is saturated with H, S, which occurs when [H, S] = 0.100 M, the equilibrium shown is established. H, S(aq) + 2 H, O(1) = s2-(aq) + 2 H,O*(aq) Keq 1.1 x 10-20 An aqueous solution containing 0.0331 M Zn2+ and 0.0331 M Ag+ is saturated with H, S. Above what concentration of S2- will ZnS precipitate? The Ksp of ZnS is 2.0 × 10-25. [s²-] = M Above what concentration of S2- will Ag, S precipitate? The Ksp of Ag, S is 3.3 x 10-50. [s²-] = M