6. Chemical Quantities & Aqueous Reactions

What is the oxidation state of the central metal ion in K2[Ni(CN)4]?

Oxidation

What is the oxidation state of the central metal ion in the complex [Cu(NH3)4]Br2?

What is the oxidation state of each individual carbon atom in the oxalate ion, C2O4^{2-}?

What is the oxidation number of nitrogen in the compound NH3?

In the reaction 2Fe2O3 + 3C → 4Fe + 3CO2, what is being oxidized?

Which choice correctly identifies the oxidation number (o.n.) of sulfur in the compound Na2SO4?

In the redox reaction Fe + CuSO_4 → FeSO_4 + Cu, assign the correct oxidation number to iron (Fe) in FeSO_4.

Which of the following elements is most likely to have an oxidation number of +2 in its compounds?

What is the oxidation state of an individual bromine atom in NaBrO_3?

Which of the following is the most common oxidation number for group 15 elements in their compounds?

Given a solution containing 2.00 × 10^{-3} M Ca^{2+} and 3.00 × 10^{-2} M SO_4^{2-}, what is the value of the charge (q) carried by the ions in 1.00 L of this solution? (Use the elementary charge e = 1.602 × 10^{-19} C.)

Which of the following statements is associated with oxidation?

Which of the following is an oxidation half-reaction?