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Change in the concentration of a reactant or product per unit time.

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    The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in...



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Buffer Solution

Solution that resists change in pH, contains either a weak acid and a soluble ionic salt of the acid or a weak base and a soluble ionic salt of the base.

Phenol

Hydrocarbon derivative containing an [OH] group bound to an aromatic raing.

 

Resonance

The concept in which two or more equivalent dot formulas for the same arrangement of atoms (resonance structures) are necessary to describe the bonding in a molecule or ion.

Boron Hydrides

Binary compounds of boron and hydrogen.

Solvolysis

The reaction of a substance with the solvent in which it is dissolved.

Ionic Geometry

The arrangement of atoms (not lone pairs of electrons) about the central atom of a polyatomic ion.

Fluids

Substances that flow freely, gases and liquids.

Conformations

Structures of a compound that differ by the extent of rotation about a single bond.

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.

Essential Oil

A plant extract that has a distinctive odour or flavour.