Given the activity series, which of the following elements can reduce copper(II) elemental copper? Element Half-Reaction Lithium Li → Li* + e- Potassium K→K* + e- Barium Ва — Ва* + 2 е- Calcium Са— Са?* + 2 е- Magnesium Mg → Mg²+ + 2 e- Al → A3+ + 3 e Aluminum Zinc Zn→ Zn?+ + 2 e- Chromium Cr+ Cr3+ + 3 e- Iron Fe → Fe2+ + 2 e- Co - Co2+ + 2 e- Ni → Ni2* + 2 e Cobalt Nickel Tin Sn- Sn+ + 2 e- Lead Pb → Pb2+ + 2 e- Hydrogen H2 →2 H* + 2 e- Cu → Cu?+ + 2 e- Ag → Ag* + e Copper Silver Platinum Pt → Pt2+ + 2 e- Gold Au - Au* + e O A) nickel B) iron C) zinc D) all of the above E) none of the above Reducing strength

Complete and balance the following redox reaction in acidic solution. Be sure to include the proper phases for all species within the reaction. MnO4 (aq) + S₂O3²¯(aq) → S4O6²¯(aq) + Mn²+ (aq) 1 1 + 04- e 2 Reset OH- ñ 4 3 4 ( ) 3 4 5 H+ 5 H3O+ 12 S 口。 (s) ²+ 7 H Mn 7 3+ ∞ 4+ • x H₂O 9 (1) (g) 口口。 O (aq) H₂O Delete

Which is the balanced chemical equation for the following redox reaction in a basic medium?   MnO4- + SO32- → MnO2 + SO42-   2MnO4- + 3SO32- + H2O → 2MnO2 + 3SO42- + 2OH-   MnO4- + SO32- → MnO2 + SO42-   MnO4- + SO32- + 2H+ → MnO2 + SO42- + H2O   2MnO4- + 3SO32- + 2H+ → 2MnO2 + 3SO42- + H2O   Given the reaction of the synthesis of ethyl acetate:   CH3COCH3 + Br2 + H3O+ → CH3COCH2Br + HBr + H3O+ Which is the catalyst?   H3O+    CH3COCH3   CH3COCH2Br   Br2   3. Calculate the order of reaction with respect to O2.   1.5   2   1   0

Balance the following redox reaction in BASIC conditions. Once you complete the balancing use your workings to answer four questions on this quiz. Mn2+ (aq) + BiO3 → Biš+ (aq) + MnO4 (aq) (aq) In the final balanced BASIC reaction, which statement is true? There is no water in the final balanced reaction There are 7 water molecules on the reactant side There are 7 water molecules on the product side There are 14 water molecules on the reactant side There are 14 water molecules on the reactant side and 7 water molecules on the product side

Identify whether each of the following reaction is a redox reaction. If it is so, by showing the change in oxidation numbers identify the oxidizing agent and reducing agent. 4 CaSO3 ⟶ 3 CaSO4 + CaS 2 KMnO4+ 3 H2O2 → 2 MnO2 + 2 KOH + 2 H2O + 3 O2

/variants/1189727/take/9/ ☆ 88 MULTIPLE CHOICE Question 10 Which half-reaction correctly represents oxidation? Fe(s) → Fe +2 A Fe(s) B Fe +2 (aq) + 2e¯ (aq) → Fe(s) + 2e- + 2e → Fe+2 (ag) D Fe +2 (aq) + 2e¯ → Fe(s)

c. For the unbalanced redox reaction Cu + 10 ➜→ Cu²+ + 1₂ Which is oxidizing agent (oxidant)? Write the balanced redox net ionic equation when the reaction is conducted in an acidic solution.

Specify whether the reactants of the given half-reaction is an oxidizing or reducing agent. VO, (aq) → V² (aq) AsH3(g) → As(s) Ag(s)→ Ag₂O(s) Cr(s) → Cr³+ (aq) (in acid) (in acid) (in base) (in acid) Choose... Choose... Choose... Choose... + + +

Assign oxidation numbers to each of the elements in the compounds below. nitrosyl fluoride NOF chromate ion Cr Cro, hydroxylamine NH2OH N 0