Equilibrium Questions and Answers

Cobalt ions form complex ions with water and chloride as
Physical Chemistry
Equilibrium Solutions
Cobalt ions form complex ions with water and chloride as shown in the reaction. The left side of the reaction is pink, and the right side of the reaction is blue. Co(H₂O)2 + 4C+ heat <--> CoCl2 + 6H₂O
Which of these is NOT a good method for preparing a buffer?
Physical Chemistry
Equilibrium Solutions
Which of these is NOT a good method for preparing a buffer? (HA is a weak acid.) Group of answer choices Equal volumes of 0.5 M HA and 0.5 M NaA Equal volumes of 1.0 M HA and 0.5 M NaOH Equal volumes
A solution has a hydrogen ion concentration of 1.32 x 10-³
Physical Chemistry
Equilibrium Solutions
A solution has a hydrogen ion concentration of 1.32 x 10-³ mol/L. Determine the pH of the solution. a) 2.88 b) -0.12 c) 0.12 d) -2.88
When an acid, HA, is titrated with 0.1 M NaOH, the pH at the
Physical Chemistry
Equilibrium Solutions
When an acid, HA, is titrated with 0.1 M NaOH, the pH at the half equivalence point of the titration is 4.5. What is the Ka of the acid? Multiple Choice 32x10-5 3.2x10-10 1.8 x 10-3
How does adding an inhibitor affect the rate of a reaction?
Physical Chemistry
Equilibrium Solutions
How does adding an inhibitor affect the rate of a reaction? It does not affect the rate of a reaction suppresses the production of activated complexes increases activation energy decreases activation
Write the net ionic equation for the neutralization of
Physical Chemistry
Equilibrium Solutions
Write the net ionic equation for the neutralization of nitric acid by sodium hydroxide in aqueous solution. H+(aq) + OH¨(aq) → H₂O(l) H+(aq)+NO3(aq) +OH-(aq)→ NO3(aq)+ H₂O(l) HNO3(aq) +Na+(aq)+
If 20.0 mL of HNO3(aq) is used to neutralized 50.00 mL of
Physical Chemistry
Equilibrium Solutions
If 20.0 mL of HNO3(aq) is used to neutralized 50.00 mL of 0.200 mol/L NaOH, a) What is the balanced chemical equation. b) Find the molar concentration of the HNO3? c) What is the pH at the end of the
Problem Statement: Estimate how many Rolaids tablets are
Physical Chemistry
Equilibrium Solutions
Problem Statement: Estimate how many Rolaids tablets are required to neutralize all the acid in one glass (250 mL) of a regular cola drink. Assume that: cola drink pH = 3.0 one Rolaids tablet contains
Choose the balanced equation for the reaction, even if the
Physical Chemistry
Equilibrium Solutions
Choose the balanced equation for the reaction, even if the reaction is reactant-favored. NH₄⁺(aq) + HSO₄‾(aq) A. NH₄⁺(aq) + HSO₄‾(aq) –> NH(aq) + H₂SO₄(aq) B. NH₄⁺(aq) + HSO₄‾(aq) -> NH₅²⁺(aq) +
The ionization constant of a very weak acid, HA
Physical Chemistry
Equilibrium Solutions
The ionization constant of a very weak acid, HA, is 5.2x10‾⁹. Calculate the equilibrium concentrations of H₃O⁺, A‾, and HA in a 0.040 M solution of the acid. Determine the concentrations of all
What is the pH of a 3.17x10‾⁵ M solution of the strong acid
Physical Chemistry
Equilibrium Solutions
What is the pH of a 3.17x10‾⁵ M solution of the strong acid HClO₄? HClO₄(aq) + H₂O(l) –> ClO₄‾(aq) + H₃O⁺(aq) [HCIO₄]₀ = 3.17 x 10‾⁵
Choose the chemical equation for the autoionization of
Physical Chemistry
Equilibrium Solutions
Choose the chemical equation for the autoionization of water. a. 2H₂O(l) ⇄ 2H₂(g) + O₂(g) b. 2H₂O(l) ⇄ OH⁺(aq) + H₂O‾(aq) c. 3H₂O(l) ⇄ O₂‾(aq) + 2H₂O⁺(aq) d. 2H₂O(l) ⇄ OH‾(aq) + H₂O⁺(aq)