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Water containing Fe3+, Ca2+, and Mg2+ ions, which forms precipates with soap.

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Alpha Particles

A helium nucleus.

Electrolysis

Process that occurs in electrolytic cells.

Three ways to make patina at home

The first way is ammonia patination. To do this, take a plastic container. Put a couple of paper or ordinary towels at the bottom. Moisten them with ammonia. Then sprinkle with large table salt.

Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Spectrochemical Series

Arrangement of ligands in order of increasing ligand field strength.

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.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Alkylbenzene

A compound containing an alkyl group bonded to a benzene ring.

Supercritical Fluid

A substance at temperature above its critical temperature.

End Point

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