Flashcards on Redox Reactions

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What is a redox reaction?

A redox reaction is a chemical reaction that involves both oxidation and reduction.

What is oxidation?

Oxidation is the loss of electrons by a substance.

What is reduction?

Reduction is the gain of electrons by a substance.

What is an oxidizing agent?

An oxidizing agent is a substance that causes oxidation by accepting electrons.

What is a reducing agent?

A reducing agent is a substance that causes reduction by donating electrons.

What is the oxidation state of an element in its pure form?

The oxidation state of an element in its pure form is zero.

What is the oxidation state of hydrogen in most compounds?

The oxidation state of hydrogen in most compounds is +1.

What is the oxidation state of oxygen in most compounds?

The oxidation state of oxygen in most compounds is -2.

What is the oxidation state of an element in a monatomic ion?

The oxidation state of an element in a monatomic ion is equal to the charge of the ion.

What is the sum of oxidation states in a neutral compound?

The sum of oxidation states in a neutral compound is zero.

What is the maximum oxidation state of an element in a compound?

The maximum oxidation state of an element in a compound is equal to its group number.

What is the minimum oxidation state of an element in a compound?

The minimum oxidation state of an element in a compound is usually -3.

What is the reducing agent in the reaction: Fe2O3 + 2Al -> 2Fe + Al2O3?

Aluminum (Al) is the reducing agent.

What is the oxidizing agent in the reaction: Cu + 2AgNO3 -> Cu(NO3)2 + 2Ag?

Silver nitrate (AgNO3) is the oxidizing agent.

What is the oxidation state of chlorine in HClO4?

The oxidation state of chlorine in HClO4 is +7.

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Test Your Knowledge


What is a redox reaction?



Which of the following is the reducing agent in the reaction: 2Na + Cl2 -> 2NaCl?



What is the maximum oxidation state of an element in a compound?



What is the oxidation state of oxygen in H2O2?



What is the sum of oxidation states in a neutral compound?



What is the reducing agent in the reaction: CuO + H2 -> Cu + H2O?



What is the oxidizing agent in the reaction: 2K + Cl2 -> 2KCl?



What is the oxidation state of sulfur in H2SO4?



What happens to the oxidation state of an element in a reduction reaction?



What happens to the oxidation state of an element in an oxidation reaction?




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