::..Formulas of Ions and Compounds, Chemistry formulas, Chemistry dictionary..::

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::..Formulas of Ions and Compounds, Chemistry formulas, Chemistry dictionary..::

 
carbonyl chloride   COCl2
synonyms:
phosgene; carbon oxychloride.
molecular weight:
98.91655
density:

carbon disulfide   CS2
molecular weight:
76.13915
incompatibilities:
acids
calcium   Ca
synonyms:
calcium metal.
atomic weight:
40.08
DH°f :

solid



gas


S° :

solid



gas


atomic ground state:
1s22s22p63s23p64s2
appearance:
Soft, silvery reactive metal that can be cut with a knife; tarnishes quickly in air.
atomic number:
20
bp:

density:

at
discovery date:
1808
mp:

notes:
Radioactive isotopes calcium-45 and calcium-47 are used in medical research to trace calcium in cell and bone growth, and in the study of calcium ion exchange in soil and aquatic chemistry.
Calcium is the third most abundant element on Earth.
Calcium is obtained by electrolysis of molten calcium chloride, or by reduction of calcium chloride with sodium metal.
calcium ion   Ca+2
molecular weight:
40.08
DH°f :

aqueous,at ,1 bar
S° :

aqueous,at ,1 bar
ionic radius:

standard reduction potential:
 Ca2+(aq) + 2e-  Ca(s)    E°=

calcium chloride   CaCl2
molecular weight:
110.986
appearance:
white deliquescent pellets or crystals.
density:

at
mp:

solubility:
soluble in water,soluble in alcohol
uses:
drying agent

calcium chloride monohydrate   CaCl2&H2O
molecular weight:
129.00134
appearance:
white deliquescent pellets or crystals.
mp:

solubility:
soluble in water,soluble in alcohol
uses:
drying agent; melting ice and snow on road surfaces.

calcium chloride hexahydrate   CaCl2&6H2O
molecular weight:
129.00134
appearance:
white deliquescent pellets or crystals.
density:

at
mp:

solubility:
soluble in water,soluble in alcohol
uses:
drying agent; melting ice and snow on road surfaces.

calcium carbonate   CaCO3
synonyms:
marble; aragonite; calcite; pearl; chalk; coral; seashells; eggshell; limestone; white wash; calcamine.
molecular weight:
100.08935
Ksp:
3.84 × 10-9
at
density:

uses:
spread on soil to neutralize excess acidity and raise calcium levels; added to some wines to reduce acidity; used to harden water in beer-making

calcium aluminate   3CaO·Al2O3
synonyms:
tricalcium aluminate.
molecular weight:
270.1994
uses:
key ingredient in cement.

calcium acetate   Ca(CH3COO)2
synonyms:
vinegar of lime; gray acetate of lime; brown acetate of lime; calcium diacetate; anhydrous calcium acetate.
molecular weight:
158.17002
appearance:
hygroscopic white crystals.
density:

notes:
Decomposes into acetone and calcium carbonate on heating.
uses:
manufacture of acetone and acetic acid; mordant in dying; food stabilizer; corrosion inhibitor.