How to prepare calcium carbonate aqueous solution and how to dissolve calcium carbonate

Preparation method fold.

1 Remove the stopper of quicklime and use a spoon to remove a small amount of quicklime solid beaker from a beaker;

2 Add water to dissolve, stir with a glass rod;

3. Make a filter with filter paper, the filter paper should not exceed the edge of the funnel, and the filter paper should be attached to the inner wall of the funnel;

4. The liquid flows into the filter along the glass rod;

5. Do not exceed the edge of the filter paper with liquid in the filter;

6. After filtration, remove the filter and put the filter paper into the waste tank;

7. Clean the instrument and tidy up the test bench.

The chemical equation for the reaction of carbon and fission acid nuclei sodium hydrochloride and calcium hydroxide is as follows:

1. Ca(OH)2 sufficient: NaHCO3 + Ca(OH)2=NaOH+CaCO3 +H2O

2. Sufficient amount of NaHCO3: 2NaHCO3 + Ca(OH)2=Na2CO3 + CaCO3 +2H2O

The ionic equation for the reaction of sodium bicarbonate and calcium hydroxide is given below:

1. Ca(OH)2 sufficiency: HCO3- +OH- +Ca2+ =CaCO3 +H2O

2. NaHCO3 sufficiency: 2HCO3- +2OH- +CA2+ =CO32- +CAC3 +2H2O

Because calcium carbonate can react with hydrochloric acid to form gas and solvent reflux, silica will not react and will not be dissolved, so it is filtered and separated.

Calcium carbonate (CACO) is an inorganic compound commonly known as limestone, limestone, stone powder, marble, etc. Calcium carbonate is neutral, basically insoluble in water, and sensitive to hydrochloric acid. It is one of the most common substances on earth, found in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of animal bones or shells.

Calcium carbonate is also an important building material and has a wide range of industrial uses.

How many cubic meters of water do you need to add to make a solution of 200 grams per liter from 2 tons of calcium carbonate?

Hello, because the weight of 1 liter of the solution is about 1000g, then the ratio you require is (calcium carbonate and water) 1:4;So 2 tons of calcium carbonate requires 8 tons of water, that is, 8 cubic meters of water!

a. Calcium carbonate is insoluble in water and mixes with water to form a suspension, so it cannot form a solution, so A is wrong;

b. Gasoline is insoluble in water and mixes with water to form an emulsion, not a solution, so B is wrong;

c. Iodine is easily soluble in alcohol to form a uniform and stable mixture, which belongs to the solution, so C is correct;

D. The soil is dissolved in water and deposited to the bottom of Hudanheng, which is not uniform and unstable, and forms a suspension over the years, which does not belong to the solution, so D is wrong

Therefore, the late draft c was chosen

The calcium ions in calcium carbonate will displace the hydrogen ions in dilute hydrochloric acid out of the hall to form calcium chloride and carbonic acid, but because carbonic acid is unstable and will decompose into carbon dioxide and water, calcium carbonate will react with dilute hydrochloric acid and will not dissolve in dilute hydrochloric acid, pretending to be because calcium chloride is a precipitate.

The reaction equation is Ca2CO3+2HCl===2CaCl+H2CO3

Since the carbonic acid is unstable, the Heshen reaction equation is Ca2CO3+2HCl===2CaCl+H2O+CO2