Redox

Another name for a "oxidation-reduction" reaction is

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

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Tags

NGSS.HS-PS1-1

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Which statement is true:
Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons
• Mg_²⁺ loses 2 electrons
• Mg loses 1 electron
• Mg loses 2 electrons

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

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⁺

Tags

NGSS.HS-PS1-7

In a reaction, copper is reduced; its number of electrons has:

• Increased

• Decreased

• Remained Constant

• Varies Randomly

Tags

NGSS.HS-PS1-2

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

• Iron
• Fluorine
• Oxygen

What is the name of the compound Cu(SO₄)?

• Copper sulfide

• Copper sulfate

• Copper sulfite

• Copper sulfuroxide

What is the formula for copper(II) sulfate?

• CuSO₃
• CuSO₄
• Cu₂SO₃
• Cu₂SO₄

Tags

NGSS.MS-PS1-1

When a solid drops out of a solution we call it a

• Precipitate

• Change in shape

• Change in state

• Gas production