Here is a simple answer. Soil has bacteria in it and some soils have more nasty bacteria in them than others when it comes to human health. The dust that is kicked up by a large group of people circulates such bacteria and then your skin has an allergic reaction. Your skin and digestive system normally is made up of bacteria providing some positive services to the human body.
So it's "kicked-up bacteria," which, as Dave Barry says, would make an excellent name for a rock group. Maybe one of those country-punk bands.
It is calcium chloride .But it exists as CaCl2.2H2O in its hydrated state.
CaO(aq) + 2HCl(aq) -> CaCl2(aq) + H2O(l) An ionic bonded and dissociated compound, calcium oxide, reaction with a fully dissociated strong acid, hydrochloric acid that produces a dissociated salt, calcium chloride and water.
First answer:I'm pretty sure its aqueous because it starts off as a powder and it dissolves in hydrochloric acid. Second answer:Actually, calcium chloride itself is a solid/in the solid state. When dissolved in water, it is in the aqueous form (definition of aqueous is that the solvent is water).
Calcium carbonate is more coomonly known as limestone,when it is pure it is white howevr in its natural state it is grey.. calcite in caves is also calcium carbonate and varies in colour, e.g. oranges browns and yellows
If you were trying to write CaCl2, then that is the formula.If you wanted the name (of what I wrote, not the nonsense you wrote) then it would be calcium chloride. I suppose technically you could say calcium (II) chloride, but that would be rather pedantic; oxidation states for calcium other than +2 are so rare that the oxidation state is usually only specified when it's something other than +2.
CaCl2, or calcium chloride, is used as a de-icer to clear snow in cold countries because it is highly effective in melting ice and snow. Calcium chloride has a lower freezing point than water, allowing it to remain in a liquid state even in extremely cold temperatures. It is also hygroscopic, meaning it attracts moisture from the air and forms a brine solution that melts snow and ice on contact.
Silver Chloride is a solid state of matter
symbol of calcium is Ca
-2 oxidation state
Calcium is in a solid state at 25 degrees.
The oxidation state of calcium is +2.
Not in its usual solid state. But like other ionic compounds calcium chloride will conduct electricity if molten or dissolved in water.