6. Chemical Quantities & Aqueous Reactions

In the redox reaction 2 KMnO4 + 3 Na2SO3 + H2O → 2 MnO2 + 3 Na2SO4 + 2 KOH, which element is reduced?

Which electron carrier delivers electrons to the electron transport chain in redox reactions?

In a redox reaction, which of the following statements is correct?

Oxidation and reduction always occur simultaneously and are referred to as a(n) __________ reaction.

Which of the following represents the oxidation half-reaction that occurs at the anode in a hydrogen fuel cell?

Which of the following changes represents an oxidation process?

If a compound is reduced in a redox reaction, what happens to it?

Which of the following reactions is a redox reaction?

H_2 (g) can be oxidized by which of the following?

In redox reactions, why is the term 'reduction' used to describe the gain of electrons by a species?

Rust will form on an iron nail when which of the following has occurred?

Redox reactions involve the gain or loss of _____.

In the following redox reaction: Cr2O7^{2-} + 3 HNO2 + 5 H^+ → 2 Cr^{3+} + 3 NO3^- + 4 H2O, which substance acts as the reducing agent?

Which of the following reactions results in the oxidation of sulfur?

Which of the following is an oxidation-reduction (redox) reaction?