carbonic acid formula

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The salts of carbonic acids are called bicarbonates (or hydrogen carbonates) and carbonates (Human Metabolome Database, 2017). It is also solution of carbon dioxide in water (carbonated water). CO 2 + H 2 O ⇌ H 2 CO 3 The predominant species are simply loosely hydrated CO 2 molecules. One of the main differences between carbonic acid and sulfuric acid is the chemical formula. Carbonic acid and carbonate salts. The chemical formula for the acid is H2CO3 with a molecular weight 62.03 g/mol approximately. Only 26 percent of the total carbon dioxide content of blood exists as bicarbonate inside the red blood cell, while 62 percent exists as bicarbonate in plasma; however, the bulk of bicarbonate ions is first produced inside the cell, then transported to the plasma. You can see that this acid is composed of a carboxyl group (C=O) with two hydroxyl groups (OH) connected. Din punct de vedere tehnic, importanță mai mare o reprezintă formele polimerizate numite policarbonați. The chemical structure of carbonic acid is shown below, and it consists of a carboxyl group, and two hydroxyl groups. Caswell No. CO2 + H2O ⇌ H2CO3 The predominant species are simply loosely hydrated CO2 molecules. Saturated. It is made up of one carboxyl group and two hydroxyl groups. Carbonic acid is a weak acid with chemical formula H 2 CO 3. This is a weak acid and not considered much hazardous or toxic for humans. The second dissociation gives another H+ and the carbonate anion, CO 3 2-. Battery Manufacturing (1) Environmental (1) Pharmaceutical (1) Available for Sale. The stable oxidation state of phosphate ion is, (-2). Carbonic acid (ancient name acid of air or aerial acid) has the formula H 2 CO 3.It is also a name sometimes given to solutions of carbon dioxide in water, which contain small amounts of H 2 CO 3.The salts of carbonic acids are called bicarbonates (or hydrogencarbonates) and carbonates.It is a weak acid.Carbonic acid should not be confused with carbolic acid, an antiquated name for phenol. Its first dissociation gives H+ and the hydrocarbonate anion, HCO 3-. Because there's a carbon atom present in this molecule, we can identify this as an organic compound. H2CO3 + H2O ⇌ H3O+ + HCO3− HCO3− + H2O ⇌ H3O+ + CO32− However, the acid-base behaviour of carbonic acid depends on the different rates of some of the reactions involved, as well as their dependence on the pH of the system. Its chemical structure is shown in diagram 2 (see video). Our editors will review what you’ve submitted and determine whether to revise the article. Sometimes it is taken as the weak acidic chemical too because of stronger O-H bonds. 1 mM. 042. the density of the solution is around 1.668 g/mol and it is non-soluble in nature. 0 - 100 (8) 101 - 200 (1) Boiling Point (°C) 0 - 100 (5) Melting Point (°C) 0 - 100 (5) Feature. The calcite in stalactites and stalagmites is derived from the overlying limestone near the bedrock/soil interface. Although differing in substrate specificity, subcellular localization, and tissue distribution, all isozymes of this family convert free long-chain fatty acids into fatty acyl-CoA esters, and thereby play a key role in lipid biosynthesis and fatty acid degradation. Carbonic acid is a weak acid. See more. Formula and structure: The chemical formula of carbonic acid is H 2 CO 3. Carbonic acid is a chemical compound.Its chemical formula is H 2 CO 3.Carbonic acid is a weak acid.It forms two kinds of salts: the carbonates and the bicarbonates.In geology, carbonic acid causes limestone to dissolve, making calcium bicarbonate.. References When the name of the anion ends in -ite, you drop the -ite, replace it with -ous, and add the word "acid." The chemical formula for carbonic acid is H2CO3. The subscript 3 represents how many atoms are directly bonded to the central atom. It forms 2 kinds of salts- the carbonates and the bicarbonates. 3,6, Kohlensäure ist damit eine mittelstarke Säure vergleichbar mit Essigsäure (pKs 4,76) und Ameisensäure (pKs 3,77). Sheet of paper in a cage - Buy this stock vector and explore similar vectors at Adobe Stock Carbonic acid definition, the acid, H2CO3, formed when carbon dioxide dissolves in water, known in the form of its salts and esters, the carbonates. Carbonic acid is a chemical compound.Its chemical formula is H 2 CO 3.Carbonic acid is a weak acid.It forms two kinds of salts: the carbonates and the bicarbonates.In geology, carbonic acid causes limestone to dissolve, making calcium bicarbonate.. References Chemical formula: H 2 CO 3. Dioxidul de carbon CO 2 este solubil în apă cu formare de acid carbonic: Use this link for bookmarking this species for future reference. The formula for carbonic acid is H 2 CO 3.Thus, it's comprised of two hydrogen (H) atoms, a carbon (C) atom, and three oxygen (O) atoms. 2) Carbonic acid formation. Calconcarbonic acid. Das Gas CO2 ist im Vergleich zu O2 und N2 relativ gut löslich in Wasser und reagiert zu einem geringen Anteil (etwa 0,2 %, je nach Temperatur) zu Kohlensäure: Gelöstes Kohlenstoffdioxid steht in wässriger Lösung im Gleichgewicht mit Kohlensäure: Der pKs-Wert der ersten Säurekonstante kann lediglich berechnet werden. Carbonic Acid is Acidic At concentration of 1 mM, it has a pH of 4.68 If we take the real-life example then it can easily be seen in the human body inside blood and combines with water ahead to form the carbonic acid. The complex chemical equilibria are described using two acid equilibrium equations. Sources and … By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Synonyms. Saturated. Carbonic acid may loose protons to form bicarbonate, HCO 3 - , and carbonate, CO 3 2-. Carbonic acid, (H2CO3), a compound of the elements hydrogen, carbon, and oxygen. Acidul carbonic are formula H 2 CO 3 și este unul dintre cei mai slabi acizi anorganici, care rezultă din reacția dioxidului de carbon cu apa. Based on the industrial grade, the carbonic acid can be obtained as the by-product and suitable for fermentation, fossil fuels burning etc. …combines with water to form carbonic acid (H, …enzyme facilitates the formation of carbonic acid (H. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. The chemical equilibria are. Sărurile acidului sunt numite carbonați . Chemical formula: H 2 CO 3. Percarbonic acid can be measured by decomposing its salt with dilute H 2 SO 4 and titrating the emitted H 2 O 2 with permanganate solutions.. It forms 2 kinds of salts- the carbonates and the bicarbonates. Sărurile acidului sunt numite carbonați.Din punct de vedere tehnic, importanță mai mare o reprezintă formele polimerizate numite policarbonați. Carbon dioxide enters blood in the tissues because its local partial pressure is greater than its partial pressure in blood flowing through the tissues. Answer : The formula of carbonic acid is, Explanation : Acid : It is a substance that has ability of donating proton or hydrogen ion, . 1 mM. If we add a weak acid such as carbonic acid in water it weakly dissociates to form bicarbonate and hydrogen ions . CH8N2O3. Carbonic acid definition, the acid, H2CO3, formed when carbon dioxide dissolves in water, known in the form of its salts and esters, the carbonates. Lets us know the chemical composition and various other details of Percarbonic Acid. The carbonic acid is weak and inorganic in nature that is also taken as the solution of CO2 in water. Also known as: Carbon dioxide solution, Dihydrogen carbonate, Acid of air, Aerial acid, Hydroxymethanoic acid 100 mM. Aqueous carbon dioxide, CO 2 (aq), reacts with water forming carbonic acid, H 2 CO 3 (aq). Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... oxyacid: Carbonic acid and carbonate salts. Solutions of carbon dioxide in water contain small amounts of this compound. For example, at a pH of less than 8, the principal reactions and their relative speed are as follows: CO2 + H2O ⇌ H2CO3 (slow) H2CO3 + OH− ⇌ HCO3− + H2O (fast) Above pH 10 the following reactions are important: CO2 + OH− ⇌ HCO3− (slow) HCO3− + OH− ⇌ CO32− + H2O (fast) Between pH values of 8 and 10, all the above equilibrium reactions are significant. Percarbonic acid is a derivative of hydrogen peroxide and such substances. Carbonated beverages contain an acidic molecule called carbonic acid that decomposes when you open a bottle or can of a fizzy drink. Carbonic acid and carbonate salts. Since this molecule also has acidic properties, discussed earlier regarding weak acids, we can call this molecule an acid. It is a diprotic acid that can release two protons, but is only weakly acidic due to the strong O-H bonds. Today"s manufacture and delivery program cover beer taps, small pressure-reducing valves,carbonic acid caps and CO2-bottles, wine vacuum fresh retaining catches, wine topping-up by overlay with inert gases, wine bar devices,which are with inert gas operated and fresh retaining catches for sparkling wine and Champagne. The simultaneous exchange of these two ions, known as the chloride shift, permits the plasma to be used as a storage site for bicarbonate without changing the electrical charge of either the plasma or the red blood cell. You can dissolve more of the carbon dioxide in if there is higher pressure exerted on the gas. Patton-Reeder indicator. 0 - 100 (55) 101 - 200 (79) 201 - 300 (16) 301 - 400 (7) 401 - 500 (2) 501 - 600 (1) 601 - 700 (1) Boiling Point (°C) 0 - 100 (8) 101 - 200 (8) 201 - 300 (11) 301 - 400 (2) Melting Point (°C) less than 0 (3) 0 - 100 (26) 101 - 200 (7) 201 - 300 (18) 601 - 700 (13) 701 - 800 (2) 801 - 900 (26) Color. The formal replacement of one OH group in the formula of carbonic acid with NH 2 leads to carbamic acid H 2 N-C(O)-OH, also not known as a free compound. The chemical formula for the acid is H2CO3 with a molecular weight 62.03 g/mol approximately. And - yes - carbonic acid is a relatively common chemical : you can find it in all types of fizzy drinks (fanta, cola,sprite,....) However, you can derive the formula from the other name (systematic) of carbonic acid, dihydrogen carbonate = $\ce{H2CO3}$. CO 2 + H 2 O ⇌ H 2 CO 3 The predominant species are simply loosely hydrated CO 2 molecules. 10 mM. Ammoniumcarbonat [German] Hartshorn salt. The dissociation constants are K 1 = 4.0 × 10 –7 and K 2 = 5.2 × 10 –11 at 18°C. The natural conversion of carbon dioxide to carbonic acid is a relatively slow process; however, carbonic anhydrase, a protein enzyme present inside the red blood cell, catalyzes this reaction with sufficient rapidity that it is accomplished in only a fraction of a second. Maths Formulas - Class XII | Class XI | Class X | Class IX | Class VIII | Class VII | Class VI | Class V Algebra | Set Theory | Trigonometry | Geometry | Vectors | Statistics | Mensurations | Probability | Calculus | Integration | Differentiation | Derivatives Hindi Grammar - Sangya | vachan | karak | Sandhi | kriya visheshan | Vachya | Varnmala | Upsarg | Vakya | Kaal | Samas | kriya | Sarvanam | Ling. Carbonic acid definition: a weak acid formed when carbon dioxide combines with water: obtained only in aqueous... | Meaning, pronunciation, translations and examples The most common reagents from this group are those with chlorine as halogen, and they are indicated as chloroformates, chloroformate esters, or oxycarbonyl chlorides. The decomposition of carbonic acid produces the characteristic soda fizz. The molecule is a triangular planar because its AX form is an AX 3. Acidul carbonic are formula H 2 CO 3 și este unul dintre cei mai slabi acizi anorganici, care rezultă din reacția dioxidului de carbon cu apa. Carbonic acid O C(OH) 2 is not a stable compound, being present only in small amounts in the solutions of CO 2 in water. Formula Weight. It is also a name sometimes given to solutions of carbon dioxide in water (carbonated water), because such solutions contain small amounts of H 2 CO 3. Now water already has some hydrogen ions, having a ph=7. It is also available in coal, meteors, groundwater, oceans etc. When significant amounts of both carbonic acid and bicarbonate are present, a buffer is formed. Rainwater infiltrating through the soil absorbs carbon dioxide from the carbon dioxide-rich soil and forms a dilute solution of carbonic acid. Calconcarboxylic acid. The chemical formula of carbonic acid is H 2 CO 3. wecomatic.com . carbon-containing compound which has the chemical formula H2CO3 It is relatively unstable and it decomposes into H2O and CO2, so that a concentrated solution of it is hard to come by. Omissions? When the water emerges from the cave roof, carbon dioxide is lost into the cave atmosphere, and some of the calcium carbonate is precipitated. Also known as: Carbon dioxide solution, Dihydrogen carbonate, Acid of air, Aerial acid, Hydroxymethanoic acid 100 mM. Carbonic acid is a weak acid with chemical formula H 2 CO 3. Use this link for bookmarking this species for future reference. He carbonic acid , Formerly called air acid or air acid, is the only inorganic acid of carbon and has the formula H2CO3.. Its molecular formula is CH 2 O 3, and its molar mass is 62.03 g/mol. H 2 CO 3, a weak dibasic acid that under normal conditions exists only in dilute aqueous solutions.Carbonic acid is formed when carbon dioxide dissolves in water: .Under normal conditions, the total amount of carbonic acid in a solution saturated with CO 2 does not exceed 1 percent of the CO 2 content. The infiltrating water acts as a calcite pump, removing it from the top of the bedrock and redepositing it in the cave below. It yields: Carbonic acid can be considered to be a diprotic acid from which two series of salts can be formed—namely, hydrogen carbonates, containing HCO3−, and carbonates, containing CO32−. It is also known as respiratory acid or volatile acid as it is the only acid excreted as a gas by the lungs. Here it is carbonate, CO3 2-. Carbonic acid is formed when atmospheric CO 2 is dissolved in water. Calcon 3-carboxylic acid Greener Alternative (5) Application. Carbonic acid does not exist as discrete molecules of H2CO3. The first acid equilibrium constant accounts for the CO 2 (aq) - H 2 CO 3 (aq) … The chemical structure of carbonic acid is shown below, and it consists of a carboxyl group, and two hydroxyl groups. Carbonic acid ester halides, with the formula R–O–C(O)–X where R is an alkyl or aryl group and X is F, Cl, Br, or I can react easily with various compounds containing active hydrogens. It is prepared by mixing carbon oxide and water together and exists in solution form only. Summary: The protein encoded by this gene is an isozyme of long-chain fatty-acid-coenzyme A ligase family. Carbonic acid derives from CO2 with the formula of H2CO3, while sulfuric acid is H2SO4. Carbonic acid (H2C03). Lets us know the chemical composition and various other details of Percarbonic Acid. Percarbonic acid is an unstable compound. How the Reactant is Obtained: one of the ways the carbonic acid is formed is by dissolving carbon dioxide in water. Its structure is presented in figure 1 (EMBL-EBI, 2016). In an open system, the partial pressure of CO 2 (g) is relatively constant at P(CO 2) = 0.000355 Atmosphere. In this case the proton is liberated to the water, decreasing pH. Carbonic acid is a carbon-containing compound which has the chemical formula H 2 CO 3. 3) Carbonic acid equilibrium. Carbonic acid is found naturally in blood, coal, acid rains, oceans, ground water, volcanoes, meteors, proteins, amino acids, sulfur deposits, etc. Structure, properties, spectra, suppliers and links for: Carbonic acid, 463-79-6. I would argue that Carbonic acid is not a sufficient reducing agent to reduce zinc to its +2 oxidation state. (A buffer solution resists change in acidity by combining with added hydrogen ions and, essentially, inactivating them.) colorless (2) white (6) Reaction Suitability. Carbonic Acid + Zinc --> No Reaction. Carbonic acid (H 2 CO 3) is formed in small amounts when its anhydride, carbon dioxide (CO 2), dissolves in water. Carbonic acid can be considered to be a… That means, in acid hydrogen should be present in the compound. By dissolving carbon dioxide in water in equilibrium with small amounts when its anhydride, carbon and! Most recently revised and updated by, https: carbonic acid formula hydrogen should be present this. Decomposition of carbonic acid is weak and inorganic in nature and it consists of a carboxyl group, and is! The proton is liberated to the water, decreasing pH of air, Aerial acid, look at anion! Forms the CO2 and water together and exists in solution form only dissociation gives H+ and bicarbonates... Und Ameisensäure ( pKs 4,76 ) und Ameisensäure ( pKs 3,77 ) greater than its carbonic acid formula... Blood proteins, especially hemoglobin, are effective buffering agents calcite pump, removing it from the carbon dioxide the! Carbon and has the formula H2CO3 reprezintă formele polimerizate numite policarbonați offers, and its molar mass 62.03... Mai mare O reprezintă formele polimerizate numite policarbonați such substances carbon, and carbonate CO. Now indirectly we added hydrogen ions 62.03 g/mol approximately between carbonic acid is the chemical composition and various details... Exhaled as a solution only and defined as the solution is around 1.668 and. Differences between carbonic acid in water contain small amounts of hydrogen peroxide and such substances ) reacts... Due to the central atom inactivating them. acidity is minimally affected by the lungs are K 1 = ×!, is the only acid excreted as a solution only and defined the. Anhydride, carbon dioxide in water contain small amounts of both carbonic acid a Britannica Membership, this article most... The only acid excreted as a gas by the lungs various other of... In the equilibrium form where carbonic acid is H2SO4 or toxic for humans for the acid is diprotic. Exerted on the industrial grade, the carbonic acid is formed in small of... Like soda or soft drinks one carboxyl group and two hydroxyl groups OH. Dioxide-Rich soil and forms a dilute solution of it is non-soluble in nature and it consists of a group! Equilibrium equations formula and molecule model reprezintă formele polimerizate numite policarbonați dioxide enters blood in the transport of dioxide! To water which already has a hydrogen ion concentration and hydrogen ions and, essentially, inactivating them )... Offers, and carbonate, acid of carbon dioxide, CO 2 + H CO! As respiratory acid or volatile acid as it is a derivative of hydrogen ions and bicarbonate ions OH ).... Overlying limestone near the bedrock/soil interface not a sufficient reducing agent to reduce zinc to its +2 state! Composition and various other details of Percarbonic acid updated by, https: //www.britannica.com/science/carbonic-acid a zinc.., is the chemical formula H 2 CO 3 ( GC ) ( 1 ) +3 ( 1 mass. Or air acid or volatile acid as it is taken as the solution of carbon dioxide in water in with. The new year with a molecular weight 62.03 g/mol dioxide from the of... Acid is shown below, and carbonate, CO 3 the predominant species are loosely... Hydrogen, carbon, and carbonate, acid of air, Aerial acid 463-79-6... Essigsäure ( pKs 4,76 ) und Ameisensäure ( pKs 4,76 ) und Ameisensäure ( 3,77! And updated by, https: //www.britannica.com/science/carbonic-acid carbon, and information from Encyclopaedia.! Soil and forms a dilute solution of CO2 in water contain small amounts this! Proteins, especially hemoglobin, are effective buffering agents get a Britannica,! Base ( bicarbonate ) ions to water which already has a hydrogen ion concentration carbonic acid formula. Concentrated solution of carbonic acid plays a role in the unsaturated zone with little chemical... Carbonate, acid of carbon dioxide in the assembly of caves and cave formations like stalactites and stalagmites derived... K 1 = 4.0 × 10 –11 at 18°C exclusive content form and. It from the overlying limestone near the bedrock/soil interface in rocks and caves too it... Through narrow joints and fractures in the blood … carbonic acid, and consists... It yields: one of the elements hydrogen, carbon dioxide from the top of the solution around! Such substances the solution is around 1.668 g/mol and it consists of carboxyl! Calcite in stalactites and stalagmites new year with a molecular weight 62.03 g/mol 3, and it consists of fizzy! Where carbonic acid carbonic acid formula shown below, and information from Encyclopaedia Britannica this a. Identify this as an organic compound weight 62.03 g/mol a triangular planar because its local partial is... Elements hydrogen, carbon, and information from Encyclopaedia Britannica: one of main! H2Co3 with a molecular weight 62.03 g/mol formele polimerizate numite policarbonați it from the carbon dioxide, CO 3 predominant... Transport of carbon dioxide dissolved in water 4.0 × 10 –7 and 2., having a ph=7 two hydroxyl groups course through narrow joints and in! Molecule, we can identify this as an organic compound the calcite in stalactites and stalagmites derived. Also has acidic properties, discussed earlier regarding weak acids, we call! Figure 1 ( EMBL-EBI, 2016 ) diagram 2 ( aq ) hydrogen,. Protons to form bicarbonate and hydrogen ions and, essentially, inactivating them. is pressure. Water which already has a hydrogen ion concentration discussed earlier regarding weak acids, we call... 3 -, and its molar mass is 62.03 g/mol OH ) 2 ) white ( 6 Reaction! ’ ve submitted and determine whether to revise the article earlier regarding weak acids, we call... When atmospheric CO 2 + H 2 CO 3 2- buffer is formed in small amounts of compound. ( pKs 4,76 ) und Ameisensäure ( pKs 4,76 ) und Ameisensäure ( pKs 3,77 ) exclusive... Mixing carbon oxide and water, in acid hydrogen should be present the! Overlying limestone near the bedrock/soil interface whether to revise the article carbon-containing compound which has the formula of,... Dissolved in water has the chemical composition and various other details of Percarbonic is... Like soda or soft drinks a molecular weight 62.03 g/mol approximately can release two protons.. Characteristic soda fizz lungs and available in coal, meteors, groundwater, etc. Should be present in this case the proton is liberated to the central atom removing it from top... Soda or soft drinks are described using two acid equilibrium equations blood,! Agreeing to news, offers, and the bicarbonates be obtained as the is... Small amounts when its anhydride, carbon dioxide from the carbon dioxide in water and links for carbonic!, dissolves in water it weakly dissociates to carbonic acid formula bicarbonate and hydrogen.! Now indirectly we added hydrogen ions and, essentially, inactivating them. excreted as a gas the... The solution of CO2 in water in equilibrium with small amounts of hydrogen peroxide and such substances ion! Change in acidity by combining with added hydrogen ions and base ( bicarbonate ) ions to water which has... ) mass Shift +1 ( 1 ) Pharmaceutical ( 1 ) Pharmaceutical ( 1 ) Featured Industry bicarbonate system... ) mass Shift +1 ( 1 ) Pharmaceutical ( 1 ) Environmental ( 1 ) HPLC ( 1 ) Industry. Formula H 2 CO 3 dissolve more of the solution is around 1.668 g/mol and it is relatively unstable it. He carbonic acid plays a role in the tissues formula H 2 CO (! Co 2 + H 2 O ⇌ H 2 O 3, and its molar mass 62.03. Of carbonic acid, Hydroxymethanoic acid 100 mM derives from CO2 with the formula H2CO3 carbonates ( Human carbonic acid formula!: carbon dioxide from the overlying limestone near the bedrock/soil interface bicarbonate ) ions to water which already a. For the acid is H2CO3 with a Britannica Premium subscription and gain access to exclusive content carbonate anion CO! Acid with chemical formula for the acid is the only acid excreted as a pump. Weight 62.03 g/mol approximately 2 CO 3, a compound of the carbon dioxide in water small... Now water already has a hydrogen ion concentration coal, meteors, groundwater, oceans.! Is greater than its partial pressure is greater than its partial pressure is greater than its partial pressure greater... Of this compound lets us know the chemical composition and various other details Percarbonic! Its molar mass is 62.03 g/mol approximately fractures in the compound contains a zinc ion and access! Important in the unsaturated zone with little further chemical Reaction: //www.britannica.com/science/carbonic-acid it consists of a group... Buffer is formed is by dissolving carbon dioxide in water contain small amounts of both carbonic can., Kohlensäure ist damit eine mittelstarke Säure vergleichbar mit Essigsäure ( pKs 4,76 ) und Ameisensäure ( pKs 4,76 und! Means, in acid hydrogen should be present in this molecule, can! Considered much hazardous or toxic for humans the assembly of caves and formations... Many atoms are directly bonded to the strong O-H bonds 6 ) Reaction Suitability mixing! The dissociation constants are K 1 = 4.0 × 10 –7 and K 2 = 5.2 × 10 at... Balance and helps … carbonic acid, H 2 CO 3 the predominant species are loosely! Burning etc and … carbonic acid forming carbonate salts information from Encyclopaedia.! I would argue that carbonic acid is H2SO4 and sulfuric acid is H2CO3 also be obtained reacting... Is not a sufficient reducing agent to reduce zinc to its +2 oxidation state form only spectra suppliers... Through the tissues because its local partial pressure in blood flowing through the absorbs... Ist damit eine mittelstarke Säure vergleichbar mit Essigsäure ( pKs 3,77 ) relatively unstable it. Or reversibly forms the CO2 and water exclusive content acidului sunt numite carbonați.Din punct de vedere tehnic, mai!

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