Understanding Galvanic (Voltaic) Cells

The video explains galvanic or voltaic cells, devices that convert chemical reactions into electricity through oxidation-reduction processes. It details the components of a voltaic cell, including zinc and copper electrodes, and the role of a salt bridge in maintaining charge balance. The video also covers electron flow, oxidation and reduction reactions, and how these processes are represented in cell notation.

What is another name for a galvanic cell?

• Electrolytic cell

• Voltaic cell

• Fuel cell

• Photovoltaic cell

What type of reaction is used in a voltaic cell to generate electricity?

• Combustion reaction

• Neutralization reaction

• Decomposition reaction

• Oxidation-reduction reaction

In the basic setup of a voltaic cell, what solutions are used?

• Zinc chloride and copper chloride

• Zinc phosphate and copper phosphate

• Zinc sulfate and copper sulfate

• Zinc nitrate and copper nitrate

What happens when a wire connects the zinc and copper metals in a voltaic cell?

• Neutrons start moving through the wire

• Electrons start moving through the wire

• Ions start moving through the wire

• Protons start moving through the wire

Why do electrons move from zinc to copper in a voltaic cell?

• Electrons move randomly

• Zinc and copper have equal pull for electrons

• Copper has a stronger pull for electrons

• Zinc has a stronger pull for electrons

What happens to the size of the zinc and copper metals over time in a voltaic cell?

• Both metals increase in size

• Both metals decrease in size

• Zinc decreases and copper increases in size

• Zinc increases and copper decreases in size

What is the term for the site where oxidation occurs in a voltaic cell?

• Cathode

• Anode

• Electrode

• Salt bridge

What is the term for the site where reduction occurs in a voltaic cell?

• Cathode

• Salt bridge

• Electrode

• Anode

What is the purpose of the salt bridge in a voltaic cell?

• To allow electrons to flow

• To balance the charge between the two solutions

• To separate the two solutions

• To provide a path for protons

What ions are typically found in the salt bridge of a voltaic cell?

• Sodium and chloride ions

• Hydrogen and oxygen ions

• Sulfur and phosphate ions

• Zinc and copper ions