Redox Reactions

What element is being Reduced?

• N

• H

• O

• S

Tags

NGSS.HS-PS1-2

Gaining oxygen is an example of...

• oxidation

• reduction

Tags

NGSS.HS-PS1-2

• Zinc
  

• Hydrogen

• Chlorine

• None

Oxidation-reduction reactions occur because of the competition between particles for...

• protons

• neutrons

• electrons

• positrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

• Mg is oxidized and Cl- is reduced

• Mg is oxidized and Pb+2 is reduced

• Mg is reduced and Cl- is oxidized

• Mg is reduced and Pb+2 is oxidized

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of Cr in Cr₂O₇^2- ?

• +14

• +6

• -6

• -14

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-

• Pb⁴⁺ + 2e^- →Pb²⁺

• 2O^-2 →O₂ + 4e^-

• Fe + 3e^- →Fe³⁺

__________ is reduced in the following reaction:
Cr₂O₇^2- + 6 S₂O₃^2- + 14H⁺  >   2Cr³⁺ + 3S₄O₆^2- + 7H₂O

• Cr₂O₇^2-

• S₂O₃^2- 

• H⁺

• S₄O₆^2-

Tags

NGSS.HS-PS1-2

Which of the following best describes a redox reaction?

• A chemical reaction where electrons are transferred

• A chemical reaction where electrons are lost

• A chemical reaction where electrons are gained

An increase in oxidation number.

• more acidic

• reduction

• less basic

• oxidation

Tags

NGSS.HS-PS1-7