Can limestone and quicklime be distinguished by heating and observing colors?
To distinguish between these two substances is actually very simple, limestone is insoluble in water, with water reaction; lime and water can react and heat a large number of mature lime Ca (OH) 2, alkaline aqueous solution; so the water can be used to distinguish between the two substances. In addition, the reaction between the two and dilute hydrochloric acid is also different, limestone and dilute hydrochloric acid reaction can produce carbon dioxide, bubbles produced, while the product of quicklime and dilute hydrochloric acid without gas
In the lower temperature heating conditions, both will not undergo chemical changes, the color will not change eitherAt high temperatures, limestone breaks down to produce lime and carbon dioxide, and the color itself does not change significantlyTherefore, the limestone and quicklime can not be distinguished by heating and observing the color
The main component of limestone is calcium carbonate CaCO3, and lime is calcium oxide CaO, both of which are white solid
