Quiz 10 chem

• In what direction do electrons flow in a Galvanic cell?

Electrons flow in a galvanic cell from the anode to the cathode

• Be able to determine whether a half reaction is an oxidation or a reduction

Oxidation is loss; Reduction is gain

• Given a cell diagram, which is the anode and which is the cathode?

The anode is always on the lefft and is where oxidation occurs

The cathod is always on the right and is where reduction occurs

• At which part of a Galvanic cell does oxidation occur?

At the anode

• What is the purpose of the salt bridge in a Galvanic cell?

The salt bridge maintains electrical neutrality and allows the flow of ions between the two half-cells, preventing the buildup of charge.

What does an oxidizing agent do?

Gains electrons > getting reduced > causing oxidation

What does a reducing agent do?

Looses exlectrons > gets oxidized > causing reduction

• How are oxygen and hydrogen balanced in a redox reaction in either acidic or basic solution?

In a redox reaction, oxygen atoms are balanced by adding water molecules, while hydrogen atoms are balanced by adding hydrogen ions (H⁺) in acidic solution or hydroxide ions (OH⁻) in basic solution. This ensures that both mass and charge are conserved.

• What must be true about the electrons in a balanced redox reaction?

the number of electrons lost must equal the number of electrons gained. They must cancel out completly

• In a basic redox reaction, do hydrogen ions appear in the final equation? What substance should appear in the final equation?

No, hydrogen ions do not appear in the final equation for a basic redox reaction. Instead, water and hydroxide ions appear.