The most common chemical formulas for chalk are CaCO3 (calcium carbonate) and CaO (calcium oxide). Chalk is a soft, porous sedimentary rock that is a form of limestone and is mainly composed of calcite (calcium carbonate).Know More
Chalk forms under deep marine conditions, when micro-organisms called coccolithophores shed calcite plates and these tiny plates accumulate. Chalk has high resistance to weathering and can form tall cliffs where chalk ridges connect with the sea.
Chalk is used in agriculture to raise the pH in highly acidic soils. In small doses chalk can be used as an antacid. Toothpaste often contains small amounts of chalk because of its usefulness as a mild abrasive.Learn more about Chemistry
CaO is the chemical formula for lime, which is also called calcium oxide. Calcium oxide is produced from minerals like limestone through a heating process that removes carbon dioxide.Full Answer >
Blackboard and sidewalk chalk can be made from either calcium carbonate (CaCO3) or calcium sulfate, also known as gypsum (CaSO4. Calcium carbonate is formed by the slow underwater compression and accumulation of the calcite shells of single-celled animals called coccolithophores. Gypsum is found in the form of sedimentary rock in evaporite beds and is deposited by sea and lake waters, hot-water springs and volcanic vapors.Full Answer >
The reaction between chalk and vinegar is a neutralization reaction between calcium carbonate and acetic acid to produce water, carbon dioxide and calcium acetate. Carbon dioxide is a gas that causes the reaction to bubble.Full Answer >
Pure limestone is made up of two component minerals: calcium carbonate and calcium-magnesium carbonate. The chemical formula for calcium carbonate is CaCO3. The chemical formula for calcium-magnesium carbonate is CaMg(CO3)2.Full Answer >