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Placing a thin layer of zinc on a ferrous material to protect the underlying surface from corrosion.

 

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Law of Definite Proportions (Law of Constant Composition)

The law stating that a pure substance will always have the same percent by weight. Different samples of a pure compound always contain the same elements in the same proportions by mass.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

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Bonding Pair

Pair of electrons involved in a covalent bond.

End Point

The point at which an indicator changes colour and a titration is stopped.

Electrolytic Conduction

Conduction of electrical current by ions through a solution or pure liquid.

xylidine

Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

Reaction Ratio

The relative amounts of reactants and products involved in a reaction, maybe the ratio of moles. millimoles, or masses.

 

Supersaturated Solution

A solution that contains a higher than saturation concentration of solute, slight disturbance or seeding causes crystallization of excess solute.

Do you know: some mosquitoes bite people because of their clothes

If you have ever been bitten by a mosquito, someone nearby surely gave you an explanation of why the nasty insect decided to spoil your day. Maybe they told you that you smelt good, or you had a certain type of blood or that in that shirt you looked like a potential victim.