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The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

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Chemical Safety

People use chemicals every day for a wide array of purposes, which can include work and house hold duties. Many of us fail to realize that we are actually handling potentially deadly chemicals when we simply clean the bathroom or wash the car.

This brings to mind the reason why chemical safety is so important and why you should always use the chemicals that you own for their intended purpose only. Otherwise, the repercussions could be disastrous to say the least. There are specific things that you and those around you should do when handling, storing or using chemicals in nearly every form.

Molarity

Number of moles of solute per litre of solution.

Supercritical Fluid

A substance at temperature above its critical temperature.

Sigma Orbital

Molecular orbital resulting from head-on overlap of two atomic orbitals.

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.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Indicators

For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.

Lewis Acid

Any species that can accept a share in an electron pair.

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

Percent Purity

The percent of a specified compound or element in an impure sample.