DE_Chem_4.4_Electrochemistry

Last updated over 2 years ago

22 questions

Note from the author:

Target: Take what you know about conservation (of atoms) and chemical properties of elements to describe and predict chemical equations

Instructions

Target: Take what you know about conservation (of atoms) and chemical properties of elements to describe and predict chemical equations

Engage

Required

Explore 1

Required

DE_Chem_4.4_Electrochemistry

Last updated over 2 years ago

22 questions

Note from the author:

Target: Take what you know about conservation (of atoms) and chemical properties of elements to describe and predict chemical equations

Instructions

Target: Take what you know about conservation (of atoms) and chemical properties of elements to describe and predict chemical equations

Engage

Essential Question:
What are electrolytic and voltaic cells, and what are their similarities and differences?
What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not Elemental
How did early chemists discover water was not elemental?

Required

Electrolysis of water (2H2O→2H2+ O2) is a _______ reaction (think of the different type of reactions we have studied)

Required

According to the video "Fuel Cell" how does a fuel cell work?

According to the video "Fuel Cell" people are concerned about the safety of compressed hydrogen because it can explode (combustion reaction). Researchers have found a new way to soak up hydrogen like a sponge, so you don't have to compress it. What is the new material that can safely store hydrogen and avoid the risk of explosion?

Required

According to the video "Chemicals and Electricity", what element did Humphry Davy isolate by running electricity through melted potash?

Required

Li -> Li+ + 1e-
Fe2+ + 2e- -> Fe
Al -> Al3+ + 3e-
Cu2+ + e- -> Cu+
Mg2+ + 2e- -> Mg

oxidation reaction
reduction reaction

Required

Which of the following describe the following electrochemical cell? (Hint: Anode is the electrode where oxidation reaction takes place, and in the cathode, reduction takes place) (Hint#2: Anode is the electrode where electricity moves into the external circuit, and cathode is the electrode where electricity is given out)

Explore 1

Required

In an electrochemical cell, _______  must be present. Oxidation occurs (electrons are released) at a location referred to as the _______ . Reduction occurs (electrons are gained) at a location referred to as a _______ . The anode and cathode must be _______  so that electrons and ions can _______  between them.
_______  move through wires from one electrode to the other. Then _______  take over and move through the solution to complete the circuit

Required

In a voltaic cell, the anode is __________ and the cathode is __________. However, in an electrolytic cell, the anode is __________ and the cathode is __________.

Required

This image is an example of a(n) _______ cell.

Required

This is an example of a(n) _______ cell.

Required

There are two types of electrochemical cells. Voltaic cells use chemical reactions to _______  electricity, and electrolytic cells use electricity to _______  chemical energy

Question 14 | 00:18

Question 15 | 00:36

Question 16 | 00:43

Question 17 | 00:49

00:00/00:00

Question 14

00:18

Question 15

00:36

Question 16

00:43

Question 17

00:49

Required

Electrons have potential energy. This potential energy varies depending on an electron’s _______  in a circuit. Potential energy also depends on the reaction taking place at each electrode. Cell potential is the _______  in electric potential energy between the two electrodes in a cell. This quantity is measured in _______  (V).

Required

Standard reduction potential (E°), in units of volts, measures a substance’s ability to gain electrons at standard conditions of temperature and pressure. The standard reduction potential is also called the _______  because it can be used to describe all of the reactions that occur in a cell. The standard electrode potential of an oxidation half-reaction is _______  to the standard electrode potential of the reduction reaction.

Required

In a voltaic cell, electrons are transferred through an external pathway (wire), from the anode to the cathode. Ions then are transferred through an _______ pathway.

Required

What does it mean when they say that oxidation-reduction reactions in voltaic cells are spontaneous?

Required

An electrolytic cell involves a non-spontaneous oxidation-reduction reaction. Energy must be _______  for this reaction to proceed. An electrolytic cell uses _______  energy, often in the form of a battery, to break down compounds and _______ chemical energy in a process called _______.

DE_Chem_4.4_Electrochemistry

DE_Chem_4.4_Electrochemistry

Essential Question:
What are electrolytic and voltaic cells, and what are their similarities and differences?
What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not Elemental
How did early chemists discover water was not elemental?

According to the video "Fuel Cell" how does a fuel cell work?

According to the video "Chemicals and Electricity", what element did Humphry Davy isolate by running electricity through melted potash?

What does it mean when they say that oxidation-reduction reactions in voltaic cells are spontaneous?

Essential Question:
What are electrolytic and voltaic cells, and what are their similarities and differences?
What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not Elemental
How did early chemists discover water was not elemental?

According to the video "Fuel Cell" how does a fuel cell work?

According to the video "Chemicals and Electricity", what element did Humphry Davy isolate by running electricity through melted potash?

What do they mean by 'an otherwise non-spontaneous chemical reaction'?

What external path are the electrons flowing through in this voltaic cell?

What does it mean when they say that oxidation-reduction reactions in voltaic cells are spontaneous?

What do they mean by 'an otherwise non-spontaneous chemical reaction'?

What external path are the electrons flowing through in this voltaic cell?

DE_Chem_4.4_Electrochemistry

DE_Chem_4.4_Electrochemistry

Essential Question:What are electrolytic and voltaic cells, and what are their similarities and differences?What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not ElementalHow did early chemists discover water was not elemental?

According to the video "Fuel Cell" how does a fuel cell work?

According to the video "Chemicals and Electricity", what element did Humphry Davy isolate by running electricity through melted potash?

What does it mean when they say that oxidation-reduction reactions in voltaic cells are spontaneous?

Essential Question:What are electrolytic and voltaic cells, and what are their similarities and differences?What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not ElementalHow did early chemists discover water was not elemental?

According to the video "Fuel Cell" how does a fuel cell work?

According to the video "Chemicals and Electricity", what element did Humphry Davy isolate by running electricity through melted potash?

What does it mean when they say that oxidation-reduction reactions in voltaic cells are spontaneous?

What do they mean by 'an otherwise non-spontaneous chemical reaction'?

What external path are the electrons flowing through in this voltaic cell?

Essential Question:
What are electrolytic and voltaic cells, and what are their similarities and differences?
What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not Elemental
How did early chemists discover water was not elemental?

Essential Question:
What are electrolytic and voltaic cells, and what are their similarities and differences?
What I Know...(type your answer in blue)

Watch the engage video: Electrolysis Reveals Water Is Not Elemental
How did early chemists discover water was not elemental?