Electrochemistry Concepts and Reactions

What type of chemistry involves reactions that make or use free electrons?

• Biochemistry

• Organic chemistry

• Electrochemistry

• Physical chemistry

In an oxidation-reduction (redox) reaction, what happens to electrons?

• They are created and destroyed.

• They are exchanged between substances.

• They stay in one place.

• They turn into heat.

What is the name for the strength of the push or pull on electrons in a reaction?

• Current

• Resistance

• Voltage

• Amperage

What is a device that creates electrical energy from a chemical reaction called?

• A generator

• A galvanic cell

• A transformer

• A resistor

What does voltage tell us about a chemical reaction?

• How much heat is produced.

• The electrical potential of each part of the reaction.

• How fast the reaction happens.

• The amount of light it creates.

What are the standard conditions for measuring electrical potentials in a solution?

• High temperature and low concentration.

• Low temperature and high concentration.

• 25 degrees Celsius and 1 molar concentration.

• 0 degrees Celsius and 2 molar concentration.

How is the standard cell potential for a whole reaction found?

• By multiplying the potentials of the half-reactions.

• By subtracting the potentials of the half-reactions.

• By adding the electrical potentials of the half-reactions.

• By dividing the potentials of the half-reactions.

What does a positive voltage for a reaction mean under standard conditions?

• The reaction will not happen.

• The reaction will happen on its own.

• The reaction needs heat to start.

• The reaction will go backward.