G10 Q4 Chem 2 Review [2025/05/10]

_{[USNCO-2019-N]}

Find the oxidation state of sulfur in Na₂S₂O₄.

Mathematical Equivalence

ON

_{[USNCO-2021-L]}

Find the average oxidation state of tin in the mineral abhurite:

Sn₂₁Cl₁₆(OH)₁₄O₆

Mathematical Equivalence

ON

_{[USNCO-2011-L]}

When potassium permanganate is added to an acidified solution of oxalic acid (H₂C₂O₄), it forms carbon dioxide gas and Mn²⁺ ions. What is the reducing agent in this reaction?

• potassium permanganate

• oxalic acid

• hydronium ion

• carbon dioxide

_{[USNCO-2021-L]}

If used in an electrochemical cell, which of the following half-reactions would require an inert electrode?

Choose all that apply.

• 
• 

_{[USNCO-2011-L]}

Using the provided data, find the standard potential for a gold-rhodium voltaic cell.

Provide to the correct number of significant figures.

Mathematical Equivalence

ON

_{[USNCO-2011-L]}

Consider a voltaic cell (based on the reaction provided). Which of the following changes will cause the voltage to increase?

Choose all that apply.

• Increasing the amount of solid Sn in its half-cell

• Increasing the amount of solid Cr in its half-cell

• Diluting the solution in the anode compartment

• Diluting the solution in the cathode compartment

_{[USNCO-2022-L]}

Consider the cell:

Cu²⁺ (aq) + Zn (s) --> Zn²⁺ (aq) + Cu (s) , E^o_cell = 1.10 V

Which of the following concentration combinations would result in the largest measured voltage?

• [Cu²⁺] = 1.0 M and [Zn²⁺] = 1.0 M

• [Cu²⁺] = 3.0 M and [Zn²⁺] = 1.0 M

• [Cu²⁺] = 1.0 M and [Zn²⁺] = 3.0 M

• [Cu²⁺] = 3.0 M and [Zn²⁺] = 3.0 M

_{[USNCO-2016-N]}

Consider the galvanic cell:

Zn (s) | Zn²⁺ (aq) || Cu²⁺ (aq) | Cu (s) , E^o = 1.10 V

Find the cell potential at 25^oC if the concentrations of the zinc and copper ions are 2.5 M and 0.10 M respectively. Report to 2 decimal places.

Mathematical Equivalence

OFF

_{[USNCO-2016-N]}

Find the standard reduction potential for Cr²⁺ (aq) to Cr (s).

Report to 2 decimal places.

Mathematical Equivalence

OFF

_{[USNCO-2019-N]}

Using the data provided, find the standard reduction potential of vanadium:

V³⁺ (aq) + 3 e^- --> V (s) , E^o = ???

Report to 2 significant figures.

Mathematical Equivalence

ON