In addition to a small amount of limestone in the test tube to add the right amount of dilute hydrochloric acid, will produce carbon dioxide
1) chemical resistanceIn addition to acid, many corrosive substances can not be eroded or only slowly eroded limestone.2) acid fast propertiesLimestone reacts with all strong acids to produce calcium salts and carbon dioxide. The rate of reaction depends on the impurities in the limestone and the size of their crystals. The higher the impurity content, the larger the crystal, the smaller the reaction speed. Dolomite is slower than limestone. Dolomite, limestone judgment method: with 10% hydrochloric acid drops on dolomite with a small amount of bubbles produced, drop in the limestone on the violent produce tasteless bubble, the gas can make clear lime water becomes muddy.3) resistance to various gasesChlorine and hydrogen chloride in the dry state and at room temperature and CaCO3, the reaction is very slow, until 600 C began to accelerate, generate CaCl2; sulfur dioxide at room temperature, either gaseous or liquid has no significant effect on CaCO3; nitrogen dioxide (NO2) at 15 DEG C and CaCO3 reaction to generate Ca (NO3 2, NO and CO2).
The main component of limestone is calcium carbonate, which is decomposed into calcium oxide and carbon dioxide at a higher temperature.
Produce carbon dioxide.The reaction equation is: CaCO3+2HCl=CaCl2+H2O+CO2 =Calcium carbonate (CaCO3), the main component of limestone. Lime and limestone are widely used in building materials and industrial raw materials. The limestone is directly processed into stone and fired into quicklime. Quicklime absorption of moisture or water will become ripe lime, the main component is Ca (OH) 2, can be called calcium hydroxide, lime, lime, lime, and so on, as a coating material and tile adhesive.
