Redox

What is a redox reaction?

• A reaction that involves the transfer of protons between two species.

• A chemical reaction that involves the transfer of electrons between two species, resulting in changes in oxidation states.

• A reaction that only occurs in acidic solutions.

• A process that involves the absorption of light energy to drive a chemical reaction.

What is the half-reaction method in balancing redox reactions?

• The half-reaction method involves separating the oxidation and reduction processes into two half-reactions and balancing them individually.

• The half-reaction method is a technique used to combine multiple reactions into a single equation.

• The half-reaction method focuses solely on the reduction process and ignores oxidation.

• The half-reaction method is a way to balance reactions by adjusting coefficients without separating the processes.

What is oxidation?

• Oxidation is the process of gaining electrons or decreasing the oxidation state of an atom or ion.

• Oxidation is the process of losing electrons or increasing the oxidation state of an atom or ion.

• Oxidation is the process of combining with oxygen to form a compound.

• Oxidation is the process of breaking down a compound into its elements.

What is the significance of balancing redox reactions?

• It ensures that the reaction occurs at a faster rate.

• It allows for the prediction of reaction products.

• It ensures that the number of electrons lost in oxidation equals the number of electrons gained in reduction.

• It helps in determining the temperature of the reaction.

What is the oxidation number of hydrogen in most compounds?

• 0

• -1

• +1

• +2

What is the role of an oxidizing agent in a redox reaction?

• A substance that donates electrons to another substance, causing the other substance to be reduced.

• A substance that accepts electrons from another substance, causing the other substance to be oxidized.

• A substance that increases the temperature of the reaction, speeding up the process.

• A substance that acts as a catalyst, facilitating the reaction without being consumed.

What is the role of a reducing agent in a redox reaction?

• A reducing agent is a substance that donates electrons to another substance, causing the other substance to be reduced.

• A reducing agent is a substance that accepts electrons from another substance, causing the other substance to be oxidized.

• A reducing agent is a substance that increases the oxidation state of another substance.

• A reducing agent is a substance that does not participate in the reaction.

How can you identify the substance that is oxidized in a reaction?

• The substance that gains electrons and decreases its oxidation state.

• The substance that loses electrons and increases its oxidation state.

• The substance that remains unchanged during the reaction.

• The substance that is present in the largest amount.

What is an anion?

• A positively charged ion formed when an atom loses electrons.

• A negatively charged ion formed when an atom gains one or more electrons.

• A neutral ion that has neither positive nor negative charge.

• An ion that can only exist in a gaseous state.

What is a cation?

• A negatively charged ion formed when an atom gains electrons.

• A positively charged ion formed when an atom loses one or more electrons.

• An atom that has an equal number of protons and electrons.

• A neutral atom with no charge.