Activity 5- Electrochemistry Part 1 Tesla

What is the oxidation number of chlorine in HClO?

• 0

• -1

• +1

• +5

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

What is the oxidation number of iodine in KIO₃?

• 0

• -1

• +5

• +1

Which of the following represents oxidation?

• C → CH₄

• Fe³⁺ → Fe²⁺

• Cl₂ → 2Cl^-

• Zn → ZnO

In the reaction Zn + 2HCl --> ZnCl₂ + H₂

which element, if any, is oxidized?

• Zinc

• Hydrogen

• Chlorine

• None

What is oxidation number of H in CaH₂?

• +1
• -1
• 0
• +2

Substance that oxidizes another substance by accepting its electrons.

• reducing agent

• oxidation number

• disproportionation

• oxidizing agent

Which equation represents a redox reaction?

• NaOH + HNO₃ → NaNO₃ +H₂O

• 2AgNO₃ + Zn → Zn(NO₃)₂ + 2Ag

• 2NaCl + Pb(NO₃)₂ → PbCl₂ + 2NaNO₃

• CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

The following chemical equation represents the extraction of silicon from quartz using coke.

SiO₂ + C → Si + CO₂

What is the change in oxidation number of silicon?

• +2 to 0

• +4 to 0

• 0 to +2

• 0 to +4

Consider the following reaction.

NO₃⁻ (aq) + Cu (s) → NO (g) + Cu²⁺ (aq)

Which statement is correct?

• Cu (s) is the reducing agent because it loses electrons.

• Cu (s) is the reducing agent because it gains electrons.

• Cu (s) is the oxidizing agent because it loses electrons.

• Cu (s) is the oxidizing agent because it gains electrons.