Redox Equations

Reduction involves 

• gaining electrons; gaining oxygen
• losing electrons; losing oxygen
• gaining electrons, losing oxygen
• losing electrons; gaining oxygen

Oxidation involves

• gaining electrons; gaining oxygen
• losing electrons; losing oxygen
• gaining electrons; losing oxygen
• losing electrons; gaining oxygen

In the reaction
2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

• Reduced
• Synthesized
• Oxidized
• None of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

     In the reaction Zn + H₂O --> ZnO₂ + H₂
 which element, if any, is oxidized? 

• Zinc
• Hydrogen
• Oxygen
• None

Tags

NGSS.HS-PS1-2

Another name for a "oxidation-reduction" reaction is

• chemical reaction
• neutralization reaction
• redox reaction
• nuclear reaction

Is the following reaction an example of oxidation or reduction?
2Sr + O₂ --> 2SrO

• Oxidation
• Reduction

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What substance is oxidized in the following reaction?
4Fe + 3O₂ --> 2Fe₂O₃

• Iron
• Fluorine
• Oxygen

What substance is being oxidized in the following reaction? 
Fe⁺² + MnO₄-->  Fe⁺³ + Mn⁺²   

• Fe⁺²
• Mn⁺³
• Mn⁺²
• MnO₄

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Is calcium oxidized or reduced in the following reaction? 
2CaO--> 2Ca + O₂

• Oxidized
• Reduced

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

What are the oxidation numbers of hydrogen and chlorine in HCl?

• +1, -1
• -1, +1
• -2, +2
• +2,-2