Electrolysis

Scandium is a metal. Will it form positive or negative ions?

• Positive

• Negative

Sulfur has 6 electrons in its outer shell. What will be the charge on its ions?

• +

• 2+

• -

• 2-

Positive ions are attracted to which electrode?

• Positive

• Negative

What happens to negative ions when they reach the positive electrode?

• They gain electrons to form atoms

• They gain electrons to form ions

• They lose electrons to form atoms

• They lose electrons to form ions

Oxidation is ____ of electrons.

Reduction is ____ of electrons.

In the electrolysis of molten calcium oxide. What would be produced at the negative electrode?

In the electrolysis of a solution of calcium chloride, what is produced at the two electrodes?

• Calcium and chlorine

• Calcium and oxygen

• Hydrogen and chlorine

• Hydrogen and oxygen

In the electrolysis of a solution of copper sulfate, what is produced at the two electrodes?

• Copper and sulfur

• Copper and oxygen

• Hydrogen and sulfur

• Hydrogen and oxygen

What is the missing number in this half equation?

Zn²⁺ + __ e^- -> Zn