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

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  • Gas of rotten eggs

    If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.

  • The most expensive metal in the world

    Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.

  • Harmful Chemicals Found In Food

    It's getting close to New Years and many people are starting to think about how to lose those extra pounds they managed to gain over the holidays. There are many sorts of diets and fads that have developed over the years from cutting carbs to cutting protein. Everyone has their own opinion as to...

  • Creating Malachite egg

    One of the most interesting and obvious chemical experiments is the experiment on the interaction of copper sulfate and calcium carbonate. The latter is contained in the shell of a simple egg, but copper sulphate should be searched in a chemical reagent store. This experience is simple, but...

  • Use of diamonds

    Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most...



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xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Deuterium

An isotope of hydrogen whose atoms are twice as massive as ordinary hydrogen,deuterion atoms contain both a proton and a neutron in the nucleus.

Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Concentration

Amount of solute per unit volume or mass of solvent or of solution.

Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Enzyme

A protein that acts as a catalyst in biological systems.

Critical Temperature

The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

Conformations

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