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In general, carbonic acid does not exist, it only exists in the form of CO2.
Only CO2 is introduced into calcium hydroxide to form a precipitate reaction.
It's a reaction to CO2, at the time of the college entrance examination.
CO2 is introduced into calcium hydroxide
CO2 + Ca(OH)2 = CaCO3 (precipitate) + H2O when the excess CO2 is introduced is:
The two equations of caco3 + co2 + h2o = ca(hco3)2 are often tested.
Carbonic acid is not included in the test.
Other. Acids and bases react in solution due to the fact that their H+ ions do not coexist with OH.
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You can react. CO2 is introduced into calcium hydroxide to form a precipitate, after which the precipitate disappears. This is the reaction between carbonic acid and calcium hydroxide.
CO2 is added to the water to form carbonic acid, and then the carbonic acid reacts with calcium hydroxide.
The total equation is: CO2 + Ca(OH)2 = CaCO3 (precipitation) + H2O when excess CO2 is introduced: CaCO3 + CO2 + H2O = Ca(HCO3)2
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The stability of carbonates is different.
The hydrochloric acid produced by the reaction of CaCl2 with NaHCO3 will then react with CaCO3, so it depends on the quality of various drugs to see the reaction results.
1) If there is more CaCl2, the final result is CaCO3, CaCl2, NaCl, H2O
2) If there is more NaHCO3, it is CaCO3, NaCl, H2O, CO2
Barium chloride should be similar to calcium chloride.
It's been college, I haven't touched chemistry for 2 years, I hope it can help you.
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Carbonic acid is capable of reacting with calcium oxide, and the chemical reaction equation is as follows:
The equation for the chemical reaction of carbonic acid with calcium oxide.
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Sodium hydroxide is a strong base, calcium carbonate is a weak alkali salt, and calcium carbonate is insoluble, will not hydrolyze hydrogen ions, and cannot react with hydroxide.
CaCO3 does not react with NAOH; Because in the reaction of metathesis, salt + alkali = new salt + new alkali is that the reactants are soluble, and there are precipitation or refractory ionization after the reaction;
<> calcium carbonate and sodium hydroxide.
Moreover, in CaCO3+NaOH, CaCO3 is insoluble in water and cannot move freely in solution in the form of Ca2+ and CO32-, even though NaOH exists in the solution in ionic form, it still cannot exchange components with CaCO3, so CaCO3 cannot react with NaOH.
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Glad for your question.
1.Calcium carbonate.
In the case of solids, it can react with acids that are more acidic than carbonic acid (hydrochloric acid, sulfuric acid, nitric acid).
etc.), releasing carbon dioxide.
Gases (e.g. 2HCl + CaCO3 = CaCl2 + H2O + CO2) are properties of carbonate that can combine with hydrogen ions to form water and carbon dioxide.
2.If it is a saturated solution of calcium carbonate, it may combine with other ions to form a less soluble precipitate, and the conversion between precipitates may occur.
For example, caco3+bacl2=baco3+cacl2).
3.Calcium carbonate can also be thermally decomposed in isolation from oxygen (CaCO3 = (high temperature) Cao + CO2).
4.Calcium carbonate solution in pass.
Carbon dioxide is added to produce acid salts (CaCO3+CO2+H20=Ca(HCO3)2).
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Carbonic acid (H2CO3) is very easy to decompose into H2O and CO2, so the reaction between carbonic acid and calcium hydroxide can be written.
h2co3+ca(oh)2=caco3↓+2h2o\[co2+ca(oh)2=caco3↓+h2o]
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Carbonic acid and calcium oxide can react. The equation is: CO2 + H2O + 2Cao = CaCO3 + Ca(OH)2 (CO2 + H2O is considered as "carbonic acid" as a whole).
The main component of soda lime is calcium oxide, which can be used to dry and remove water and absorb CO2.
Reaction phenomenon: First, calcium and water are oxidized to produce calcium hydroxide. The carbonic acid then reacts with calcium hydroxide to form a white precipitate. Therefore, after adding carbonic acid to calcium hydroxide solution, there will be a white precipitate in the solution, and the white precipitate is calcium carbonate.
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Yes. In fact, this reaction is carried out by introducing carbon dioxide into the turbid lime water (containing calcium carbonate) (which reacts with the water to form carbonic acid), and the turbid lime water becomes clear (calcium bicarbonate is produced).
caco3+h2o+co2===2ca(hco3)2
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The reaction of carbonic acid and calcium is a chemical reaction between calcium ions and carbonate ions (CO32-) and can be expressed as:
ca2+ +co3^2- →caco3
In this reaction, calcium ions and carbonate ions combine to form a solid calcium carbonate (CaCO3). Although both carbonic acid and calcium are solids, they can be dissolved in water, allowing for a reaction.
In practice, if the concentration of carbonic acid and calcium is too high, or if the reaction speed is too fast, then the solid calcium carbonate produced during the reaction will form a water-insoluble precipitation, thus hindering the continuation of the reaction. In this case, the reaction stops because not enough reaction products are formed.
However, if the reaction conditions are suitable, such as the concentration of carbonic acid and calcium is high and moderate, and the reaction rate is slow, then carbonic acid and calcium can react to form soluble calcium carbonate, and the reaction will continue until all the carbonic acid and calcium in the reactants are consumed.
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Excess calcium hydroxide produces calcium carbonate and sodium hydroxide, and the hydroxide in the aqueous solution comes from calcium hydroxide, and when the calcium hydroxide is in small amounts, the hydroxide in the solution comes from the hydroxide generated by the hydrolysis of carbonate. If the concentration of sodium bicarbonate is n, and the volume change of the solution before and after the reaction is not counted, then when calcium hydroxide is excessive, the concentration of hydroxide is n, and when calcium hydroxide is small, the concentration of hydroxide is less than n, because carbonate cannot be completely hydrolyzed, and its two-step hydrolysis is very small. So in these two solutions, hydroxide is more in (1).
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