Limestone problem, what is limestone

1) Analysis: It is different from , but only different, indicating that when 15g of limestone is added, dilute hydrochloric acid has been consumed, and the carbon dioxide produced can not be more.

2) (draw your own picture) analysis: every 5g produces carbon dioxide, then the production of carbon dioxide needs limestone, pay attention when drawing: when the limestone mass is less, the generation of carbon dioxide increases with the increase of the added limestone mass, it is a straight line, the limestone mass is greater than the hydrochloric acid is consumed, and the generation of carbon dioxide has been.

3）caco3———co2

x can be obtained x=4g (4g, 5g)*100%=80%4)caco3———CO2

10*80%=8g y=

Then the residual solid mass should be ( ).

It can be concluded that according to how much less mass is reduced after calcination of limestone, it can be known how much carbon dioxide is generated (because the impurities in it do not participate in the reaction), so as to find the mass of calcium carbonate in it, and thus the mass fraction of calcium carbonate in limestone.

3) Find the mass fraction of calcium carbonate in limestone.

CaCO3+2HCl=CaCl2+H2O+CO2x x=4g 4 5=80%.

4）caco3=cao+co2

10*80% y y=g.

The mass of the residual solid should be ( g ) He thinks that the mass fraction of calcium carbonate in limestone can also be calculated from this, do you think it is possible? ("No").

Limestone is not pure calcium carbonate and has impurities.

Limestone is an inorganic compound, commonly known as limestone, limestone, stone powder, marble, etc.

The main component of limestone is calcium carbonate, which is neutral, basically insoluble in water and soluble in hydrochloric acid. It is one of the common substances on the earth, found in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of animal bones or shells.

Lime has quicklime and hydrated lime, the main component of quicklime is CAO, generally lumpy, pure white, light gray or light yellow when containing impurities. The main component of hydrated lime is Ca(OH)2, which is blended into lime slurry, lime paste, lime mortar, etc., which is used as a coating material and brick and tile binder.

Uses of limestone

1. Manufacture glass.

The materials used to make glass are limestone, quartz sand, soda ash, etc., which can be obtained after smelting at high temperatures.

2. Steelmaking.

In industrial production, limestone is also the solvent and decellation stone for ironmaking, and quicklime is used here, which can be used as a slag material to filter out sulfur, phosphorus and other harmful on-the-job.

3. Fillers for rubber, plastic, paper, cosmetics, toothpaste and other products.

After the limestone is fired, it becomes pure, dry, powdered calcium carbonate, which can be used as a filler for many products.

4. Manufacture of soda ash.

Soda ash is obtained by using limestone, salt, ammonia and other materials using the Solvay method through a multi-step reaction, and bleaching is achieved through the chemical reaction of pure slaked lime.

5. Make table salt.

After chemical processing, limestone can be turned into calcium salts such as calcium chloride, calcium nitrate, and calcium sulfite.

6. Hard water softener.

Hydrated lime can temporarily remove the hardness of water, so it is used as a hard water softener in industry.

7. Application in agriculture.

First of all, quicklime can be configured into pesticides such as Bordeaux liquid and lime sulfur mixture; Secondly, hydrated lime can change the acidity and alkalinity of the soil, improve the internal composition of the soil, and replenish the calcium in the soil. The lime mortar can then be used to paint the trunk, which protects the tree.

8. Build a house and decorate.

Limestone is the main raw material for the manufacture of cement. In addition, limestone can come to build the façade and floor of the house.

Lime is an air-hard inorganic cementitious material with calcium oxide as the main component.

Lime is made from limestone, dolomite, chalk, shell and other products with high calcium carbonate content, which are calcined by 900 1100.

Lime is the earliest cementitious material used by human beings.

Limestone, also known as calcareous carbonate, is a mineral composed of calcium ruler ions and carbonate ions, with the molecular formula CaCO3. Limestone is commonly found in marine sedimentary rocks, strata and karst, and can also be produced by artificial methods. It is widely used in building materials, metallurgy, chemistry and other industries, and is a very important raw material.

Limestone is a sedimentary rock composed of calcium carbonate minerals, mainly composed of calcium carbonate (CaCO3), and the common color is white or gray. It is one of the most common rocks on Earth and is widely distributed all over the world, especially in the ocean. Limestone is often used in construction, cement, glass, fertilizers, lead and paper, fine chemicals, and more.

Hello, limestone is a carbonate rock, which is made of calcium carbonate and quartz deposits, and its form is mainly composed of calcium carbonate and other minerals precipitated in aqueous solution, such as quartz, calcite, montmorillonite, etc. Limestone is mainly used in construction projects, is a very common building material, it is characterized by low cost, wear resistance, with stronger impact resistance, making the building more durable, water-soluble, making the building more waterproof, corrosion resistance, making the building corrosion more effective. In addition, limestone can also be used to make stone beads, carving, and decoration, among other things.

Summary. Hello, limestone is a carbonate rock whose main component is calcium carbonate (CaCO3). It is usually white or gray in color, but it can also be yellow, brown, or red.

Limestone is a common sedimentary rock that forms in oceans, lakes, and rivers. It can be used in building materials, chemical raw materials, metallurgical raw materials and other fields.

Hello, limestone is a carbonate rock, the main component is calcium Wuye carbonate (CaCO3). It is usually white or gray in color, but it can also be yellow, brown, or red. Limestone is a common sedimentary rock found in oceans, lakes and rivers.

It can be used in building materials, chemical raw materials, metallurgical raw materials and other fields.

Limestone is mainly composed of calcium carbonate (CaCO3). Lime and limestone are raw materials that are widely used in building materials and industry. Limestone can be processed directly into stone and fired into quicklime.

The main component of quicklime is Ca(OH)2, which can be called calcium hydroxide, and the slaked lime is blended into lime slurry, lime paste, etc., which is used as a coating material and brick binder.

Calcium carbonate is a chemical compound with the chemical formula number 471-34-1. It is a common substance on Earth and can be found in rocks. The main ingredient of animal back shells and snail shells. It is found in nature as two minerals, calcite and aragonite.

Limestone reacts with all strong acids to form calcium salts and release carbon dioxide, depending on the impurities contained in the limestone and their crystal size. The higher the impurity content and the larger the crystals, the smaller the reaction speed. Dolomite reacts more slowly than limestone.

Dolomite, limestone judgment method: with 10% hydrochloric acid dropped on the dolomite there is a small amount of bubbles, dropped on the limestone will violently produce odorless bubbles, the gas produced can make the clarified lime water turbid.

Calcium carbonate is the main component of limestone, which is the main raw material for the production of glass. Lime and limestone are used in large quantities as building materials and are also important raw materials for many industries. Calcium carbonate can be directly processed into stone and fired into quicklime.

Lime has quicklime and hydrated lime. The main component of quicklime is CAO, which is generally lumpy, pure white, and light gray or light yellow when containing impurities.