electrochemistry and corrosion

What is reduction?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

Tags

NGSS.HS-PS1-2

What is oxidation?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is an anode?

• It is the electrode where oxidation takes place.

• It is the electrode where reduction takes place.

• It is an aqueous solution containing an electrode.

• It is the salt bridge that connects half-cells.

What is a cathode?

• It is the electrode where oxidation takes place.

• It is the electrode where reduction takes place.

• It is an aqueous solution containing an electrode.

• It is the salt bridge that connects half-cells.

Is this an example of corrosion?

• Yes
• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What conditions are required for rusting?

• water only

• oxygen only

• water and oxygen

Tags

NGSS.MS-ESS2-4

In which test tube would you expect the nail to rust the most?

• A

• B

• C

• D

Which of the following is true about an electrolyte?

I Electrolyte conducts electricity in molten state.

II Electrolyte conducts electricity in solid state.

III Electrolyte is soluble in water.

IV Electrolyte undergoes chemical decomposition when it conducts electricity.

• I and II only

• II and III only

• II and IV only

• I and IV only

Which of the following is not an electrolyte?

• Molten glucose

• Aqueous ammonia

• Molten lead (II) bromide

• Molten potassium iodide

Naphthalene does not conduct electricity because it

• contains freely moving electrons.

• has very low melting points.

• consists of molecules which are uncharged particles.

• contains ionic compounds which can dissolve in water.