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Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

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Dilution

Process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent.

Specific Gravity

The ratio of the density of a substance to the density of water.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

History of fireworks

There is an assumption that the history of fireworks started in China, about 2000 years ago. It is possible that the Chinese accidentally discovered explosions by burning bamboo canes.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Capillary

A tube having a very small inside diameter.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Mechanism

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