Calcium fluoride CaF

The most abundant fluorine mineral is fluorite—calcium fluoride (CaF )— which is often found with other minerals, such as quartz, barite, calcite, sphalerite, and galena. It is mined in... 

For complete neutralization to take place, the proper amounts of acid and base must be present. The salt formed in the above reaction is NaCl. If the water were evaporated after completing the reaction, we would be left with common table salt. Sodium chloride is just one of hundreds of salts that form during neutralization reactions. While we commonly think of salt, NaCl, as a seasoning for food, in chemistry a salt is any ionic compound containing a metal cation and a nonmetal anion (excluding hydroxide and oxygen). Some examples of salts that result from neutralization reactions include potassium chloride (KCl), calcium fluoride (CaF ), ammonium nitrate (NH NOj), and sodium acetate (NaC2H302). 

These difficulties have to some extent been obviated by adding calcium chloride, CaClj (PoUenius), or calcium fluoride, CaF... (Carlson), to the crushed carbide, so as to lower the temperature of reaction. With CaCl.j the temperature of reaction is lowered to 7°o°-SooJ, and with Ca Ko the reaction temperature is about 900° C. 

When food lodges between teeth, acids form that dissolve tooth enamel, which contains the mineral hydroxyapatite, Ca5(P0,j)30H. Tooth decay can be reduced by adding fluoride to toothpaste. Fluoride replaces the hydroxide in hydroxyapatite to produce the corresponding fluorapatite, Ca3(P04)3p, and calcium fluoride, CaF, both of which are less soluble in... 

The solubility product constant is equal to the product of the concentrations of the ions in a saturated solution, each concentration raised to a power equal to its coefficient (number of moles of individual ions formed per mole of the compound) in the balanced equation.Take a look at the solubility product equation of calcium fluoride (CaF ). 

Green bright Boron (B) The addition of 3 parts potassium hydrogenosulfate (KHSO,) and 1 part calcium fluoride (CaF,) impart an emerald green coloration. Boron compounds rarely show an alkaline reaction after ignition. Green color is due to the blue and orange in the spectrum. 

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