Question

A) A solution of Ba(OH)₂ has a molarity of 0.00617 mol/L. Calculate the final pH of the solution.

B) Consider the reaction: CaBr₂(s) → Ca(s) + Br₂(l)

Which of the following statements is correct? Select all that apply.

Bromide Ion is reducing agent

NOT a spontaneous reaction

Ca is oxidized

Br is Oxidized

Br is Reduced

Ca is Reduced

Calcium Ion is the Reducing Agent

IS a spontaneous reaction

Br ion is the oxidizing agent.

Ca ion is the oxidizing agent.

C) What would cause the equilibrium to shift left CH3COOH(aq) + H2O(l) ⇌ CH3COO–(aq) + H3O+(aq).

Add HCL

pH increasing

Add acetic acid

Acetate Ion addition

D) 3 A₂ (g) + 2 Z₃ (g) ↔ 3 Z₂A₂ (g)
The equilibrium concentrations are: A₂ = 0.061 mol/L ; Z₃ = 0.769 mol/L ; Z₂A₂ = 0.245 mol/L.
Calculate the value of the equilibrium constant at 345^oC.

E)

Which of the following equations represents H₂BO₃⁻ acid

		H2BO3− (aq) + H3O+(aq) ⇌ H3BO3 (aq) + H2O(l)
		H2BO3− (aq) + HCO3−(aq) ⇌ HBO32−(aq) + H2CO3(aq)
		H2BO3− (aq) + H2S (aq) ⇌ H3BO3(aq) + HS−(aq)
		H2BO3− (aq) + H2O(l) ⇌ H3BO3(aq) + OH−(aq)
		H2BO3− (aq) + NH4+(aq) ⇌ H3BO3 (aq) + NH3(aq)

Answer 1

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