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ammonia solution (NH4OH)
solution fd'ammoniaque

Ammonia solution. It was previously called ammonium hydroxide. A solution of ammonia in water.

ammonium compounds
Composés mpl d'ammonium


Ammonium compounds.

Ammonium carbonate CO3 (NH4)
An unstable compound used as smelling salts (volatile salt).

Ammonium chloride NH4CI
A salt that undergoes dissociation into ammonia
And hydrogen chloride.

Ammonium nitrate NH4NO3
A very important compound used as a fertilizer and explosive.

Ammonium phosphate (NH4)3PO4
A chemical substance suitable for introducing both nitrogen and phosphorus into the soil.

Ammonium sulphate SO32(NH4)
Important fertilizer.


ammonium iun
ion m d`ammonium

Ammonium ion. Ammonium compounds contain an ammonium ion, as does a solution of ammonia gas in water. The ionomer is positively charged and the hydrogen atoms are arranged around the nitrogen atom in a tetrahedral manner.


amorphous
amorphe

Not crystalline. A crystalline substance, that is, it does not have any regular shape.

ampere (amp)
ampere m

Ampere. unit of electric current. The ampere measures the rate of charge flow. One ampere equals one coulomb/second.



Amphoter (from oxides and hydroxides).

Oscillator for oxides and hydroxides). Oxides or hydroxides exhibit basic and acidic properties and are said to be oscillatory. The examples given here react with both acids and alkalis to form salts.
Examples

Al2O3
Al(OH)3

PbO
Pb(OH)2

ZnO
Zn(OH)2

Example :
ZnO + 2HCI ZnCl2 + 2H₂O

ZnO + 2NaOH + H2O → Na2Zn (OH) 4
(sodium zincate)

All hydroxides of these metals dissolve in sodium hydroxide solution.

anhydride
anhydride m

Anhydrous substance. Substances that react with water to give acids. All acidic oxides are anhydrous, but some give one acid while others give two acids.

Examples

Anhydrous substance

SO3
NO2

Acid

H2SO4

HNO3 HNO2 }


anhydrous
anhydre


Anhydrous, not containing water. The term is usually applied to salts in which there is no water of crystallization.
For example.

Anhydrous copper (II) sulfate CuSO4
Anhydrous sodium carbonate NaCO3

The hydrated salts are:

CuSO4.5H2O
Na2Cl3. 10H2O
This term is also used for completely dry liquids such as anhydrous ether.

anion
anion m

A rising stray ion that is negatively charged. Stalagmites usually contain an outer orbit filled with electrons. Nonmetals form stalagmites, but complex electrolytes can also form stalagmites. Examples include:

Sulfate SO2
Manganate MnO4
Carbonate CO3
Nitrogen NO3