Chem. 805 Module Test (39 mins.)

Choose the correct purpose of electrorefining:

• To extract metals from their ores.

• To purify the metals

• To deposit a thin layer of metal over another metal.

• To neutralize the electronegativity of metals.

Choose the correct purpose for electroplating:

• To decrease the mass of a metal

• To deposit a thin layer of metal over another metal

• To deposit a layer of non-metal over another metal

• To purify a metal

Choose the correct purpose for electrometallurgy:

• To increase the lustre of a metal

• To deposit a thin layer of metal over another metal

• To restrict the movement of ions

• To extract metals from their ores

List 2 metals that use the process of electrorefining to be purified:

Define a pure substance:

• ...an element or a compound that has a fixed composition and definite physical and chemical properties.

• ...an element or a compound that has a changing composition and variable physical and chemical properties.

A balanced chemical equation is named so because the______________are the same on the reactants' side and the products' side

• number of protons

• number of electrons

• number of atoms

• number of neutrons

Fractional distillation (as a separation process) can be used because_______________substances have different melting and boiling points.

• same

• different

True or false?

A galvanic/voltaic cell will convert chemical energy to electrical energy.

• True

• False

True or false?

The presence of impurities in a pure substance will alter the melting and boiling points.

• True

• False

True or false?

An electrolytic cell will convert electrical energy to chemical energy.

• True

• False