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Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.

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Inhibitory Catalyst

An inhibitor, a catalyst that decreases the rate of reaction.

Pineapple literally "erodes" the tongue

Everyone who has ever tried fresh pineapple knows that if you eat too much, your lips and tongue hurt for a while. This is because the pineapple contains an enzyme called bromelain. This enzyme literally "erodes" the tongue.

Dry Cells

Ordinary batteries (voltaic cells) for flashlights. radios, and so on, many are Leclanche cells.

Electron Affinity

The amount of energy absorbed in the process in which an electron is added to a neutral isolated gaseous atom to form a gaseous ion with a 1- charge, has a negative value if energy is released.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Mechanism

The sequence of steps by which reactants are converted into products.

Weak Electrolyte

A substance that conducts electricity poorly in a dilute aqueous solution.

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Leclanche Cell

A common type of dry cell.

Atmosphere

A unit of pressure, the pressure that will support a column of mercury 760 mm high at 0 °C.