) Identify the reactant that gets oxidized in the following reaction. 2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g) A) H in HCl B) Cl in HCl C) Al in AlCl₃ D) Al in Al(s) E) H in H₂ 2) Identify the reactant that gets reduced in the following reaction. 2MnO₄⁻(aq) + Br⁻(aq) + H₂O(l) → 2MnO₂(s) + BrO₃⁻(aq) + 2OH⁻(aq) A) Br in Br⁻ B) Br in BrO₃⁻ C) O in MnO₂ D) Mn in MnO₂ E) Mn in MnO₄⁻ 3) In the following reaction, which element in what species is oxidized? Au(NO₃)₃ (aq) + 3 Li(s) → Au(s) + 3 LiNO₃ (aq)
) Identify the reactant that gets oxidized in the following reaction. 2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g) A) H in HCl B) Cl in HCl C) Al in AlCl₃ D) Al in Al(s) E) H in H₂ 2) Identify the reactant that gets reduced in the following reaction. 2MnO₄⁻(aq) + Br⁻(aq) + H₂O(l) → 2MnO₂(s) + BrO₃⁻(aq) + 2OH⁻(aq) A) Br in Br⁻ B) Br in BrO₃⁻ C) O in MnO₂ D) Mn in MnO₂ E) Mn in MnO₄⁻ 3) In the following reaction, which element in what species is oxidized? Au(NO₃)₃ (aq) + 3 Li(s) → Au(s) + 3 LiNO₃ (aq)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1) Identify the reactant that gets oxidized in the following reaction. 2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g)
A) H in HCl
B) Cl in HCl
C) Al in AlCl₃
D) Al in Al(s)
E) H in H₂
2) Identify the reactant that gets reduced in the following reaction. 2MnO₄⁻(aq) + Br⁻(aq) + H₂O(l) → 2MnO₂(s) + BrO₃⁻(aq) + 2OH⁻(aq)
A) Br in Br⁻
B) Br in BrO₃⁻
C) O in MnO₂
D) Mn in MnO₂
E) Mn in MnO₄⁻
3) In the following reaction, which element in what species is oxidized? Au(NO₃)₃ (aq) + 3 Li(s) → Au(s) + 3 LiNO₃ (aq)
A) Au in Au(NO₃)₃
B) N in Au(NO₃)₃
C) O in Au(NO₃)₃
D) Li
E) This is not an oxidation/reduction type of reaction.
4) Potassium permanganate solutions used in oxidation-reduction titrations are often standardized against sodium oxalate, Na₂C₂O₄, used as a primary standard. The reaction involved is 5C₂O₄²⁻(aq) + 2MnO₄⁻(aq) + 16 H⁺(aq) → 2Mn²⁺(aq) + 8H₂O(l) + 10CO₂(g) A 0.2452 g sample of sodium oxalate is dissolved in 100 mL of acid solution, and the permanganate solution is added slowly from a buret. The endpoint is reached when 15.85 mL of the permanganate solution has been added. The molar mass of sodium oxalate is 134.00 g/mol. Calculate [MnO₄⁻], the molar concentration of the permanganate solution.
5) Potassium permanganate solutions used in oxidation-reduction titrations are sometimes standardized against Fe²⁺ ion. The reaction involved is 8H⁺(aq) + MnO₄⁻(aq) + 5Fe²⁺(aq) → 5Fe³⁺(aq) + Mn²⁺(aq) + 4H₂O(l) .A convenient source for Fe²⁺ ion is ammonium iron(II) sulfate, (NH₄)₂Fe(SO₄)₂(H₂O)₆ (FW = 392.14), also known as Mohr's salt, which is readily crystallized, and the crystals resist oxidation by air. A 0.6735 g sample of Mohr's salt is dissolved in 100 mL of acid solution, and the permanganate solution is added slowly from a buret. The endpoint is reached when 17.86 mL of the permanganate solution has been added. Calculate [MnO₄⁻], the molar concentration of the permanganate solution.
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