Understanding Redox Reactions

What is the role of electrons in chemical bonding?

• They are exchanged in all chemical reactions.

• They prevent atoms from bonding with each other.

• They enable atoms to bond with each other to form molecules.

• They are only involved in covalent bonds.

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NGSS.HS-PS1-2

What does the term 'redox' stand for?

• Reactive and oxygen

• Red energy and oxidation

• Reduction or oxygen

• Reduction and oxidation

Why is oxygen considered the quintessential oxidizer?

• It donates electrons to other molecules.

• It stabilizes molecules by adding electrons.

• It pulls electrons off of one molecule to make itself more stable.

• It always gains protons in reactions.

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NGSS.HS-PS1-2

What does the mnemonic 'OILRIG' stand for?

• Oxidation is light, reduction is gravity

• Oxygen in layers, reduction in gas

• Oxidation is loss of electrons, reduction is gain of electrons

• Oxygen is light, reduction is gain

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NGSS.HS-PS1-2

What is the oxidation state of oxygen in most compounds?

• -1

• +1

• 0

• -2

How do you determine the oxidation state of sulfur in SO4^2-?

• It is always 0 in compounds

• Using third-grade algebra based on the compound's overall charge

• By assuming it's always +6

• By subtracting the number of hydrogens

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What was the Haber process used for?

• Creating water from hydrogen and oxygen

• Converting atmospheric nitrogen into ammonia

• Producing oxygen for industrial use

• Extracting silver from its ore

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NGSS.HS-PS1-6

In the Haber process, what happens to nitrogen's oxidation state?

• It increases, indicating oxidation

• It decreases, indicating reduction

• It alternates between increasing and decreasing

• It remains the same

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NGSS.HS-PS1-2

What is the result of the reaction between silver diamine and an organic aldehyde?

• Production of elemental nitrogen

• Creation of hydrogen peroxide

• Release of oxygen gas

• Formation of carboxylic acid, ammonia, and water

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NGSS.HS-PS1-2

How are electrons treated in the balancing of redox equations?

• Only considered in acid-base reactions

• Assumed to be lost in the reaction

• Counted to ensure the same number on both sides of the equation

• Ignored, as they are not important

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