Carbon dioxide is an integral part of the carbon cycle, a biogeochemical cycle in which carbon is exchanged between the Earth's oceans, soil, rocks and biosphere.econstructions show that concentrations of CO 2 in the atmosphere have varied, ranging from as high as 7,000 parts per million during the Cambrian period about 500 million years ago to as low as 180 parts per million during the Quaternary glaciation of the last two million years.
Barium chlorate. Barium chlorate, Ba(ClO3)2, is a white crystalline solid, the barium salt of chloric acid. It is an irritant and toxic, as are all soluble barium compounds. It is sometimes used in pyrotechnics to produce a green color. It also finds use in the production of chloric acid.
Lead nitrate + potassium chloride ï  lead chloride + potassium nitrate OR. Question Four: (a) A white precipitate would form (in a very pale green solution) (b) It is a precipitation reaction. (c) Barium nitrate will react with iron(II) sulfate to make barium sulfate and iron(II) nitrate.he precipitate forms because Pb 2+ (aq) react with Cl - (aq) ions to form the insoluble (ionic) solid, lead chloride. Question Three: Lead nitrate + potassium chloride ï  lead chloride + potassium nitrate OR. Lead nitrate + potassium chloride ï  potassium nitrate + lead chloride (order of the products. doesnât matter).