Salts of Carbonic Acid

Pour 2-3 ml of a 1 N sodium hydroxide solution into a test tube and pass carbon(IV) oxide through it until the solution becomes almost neutral. Heat the solution. What gas evolves After this, test the reaction of the solution with indicators. Write the equations of the reactions and explain the difierence in the action of the solutions on indicators. What salt hydrolyzes more—sodium carbonate or bicarbonate Why  

See how the carbonates of various metals change when heated. For this purpose, roast the following salts in test tubes basic copper carbonate, magnesium, calcium, and sodium carbonates, and sodium bicarbonate. Pass the evolving gas into lime water. Write the equations of the reactions. Explain why the thermal stability of the studied carbonates differs. 

---

Sodium bicarbonate, NaHCO , is the sodium salt of carbonic acid (II2C03), pfO, = 6.37. Which of the substances shown in Problem 2.43 will react with sodium bicarbonate ... 

Some acids or bases can donate or accept more than one proton, i.e. 1 mole of analyte is equivalent to more than 1 mole of titrant. If the pA"a values of any acidic or basic groups differ by more than ca 4, then the compound will have more than one inflection in its titration curve. Sodium carbonate is a salt of carbonic acid and it can accept two protons. The pKa values of carbonate and bicarbonate are sufficiently different (p/fa 10.32 and 6.38) for there to be two inflections in the titration curve. The two stages in the titration are ... 

Chemical Class Monosodium salt of carbonic acid Clinical Pharmacology ... 

Some of these salts dissolve easily in water —- all the nitrates (salts of nitric acid) and most of the chlorides (salts of hydrochloric acid). Many salts, on the other hand, are insoluble — most of the carbonates (salts of carbonic acid) and most sulfides (salts of hydrosulfuric acid). 

Carbonates and Bi carbonates. Carbonates are the salts of carbonic acid and contain the C03= radical. Bicarbonates, also called acid carbonates, are salts contg the monovalent radical HC(>3-. All carbonates are readily decompd by acids carbonates of the alkali metals are sol in w, giving an alkaline reaction all others are insol in w (Ref 5,pp 168--9 Ref 7). Carbonates are formed by the action of C02 on a soln of alkali, but if excess of the gas is passed into the soln, a bicarbonate results. Bicarbonates are sol in water, and easily decompd by heat with the reformation of the normal carbonate... 

Carbonates form an important range of compounds. They are all salts of carbonic acid (H2COs) and contain the carbonate ion (C032-). Many of them occur naturally in rock formations. For example, in... 

Carbonate A salt of carbonic acid containing the carbonate ion, C032-, for example CuC03. 

Since carbonates are salts of carbonic acid, both the acid salts and the normal salts are included under this heading. Of the many known salts that belong to this class, those most extensively used in the chemical industries are calcium carbonate and the carbonates of sodium. 

Chemical treatment of natural waters. Both directly and indirectly, the general problem of purification and treatment of natural waters is related to the chemical and physical properties of the normal and acid salts of carbonic acid. The common impurities in natural waters consist of suspended solid organic and inorganic materials and of certain dissolved salts, particularly the acid carbonates, chlorides, and sulfates of sodium, calcium, and magnesium. The solid matter may be removed by filtration, the presence of limited quantities of sodium salts is not objectionable, and the calcium and magnesium salts are eliminated only through appropriate chemical treatment. The ions that are most... 

This result is true only of salts which are called normal salts (see below). It is also characteristic of bodies which are, chemically speaking, not salts, such as water. Substances, whether salts or not, which act toward litmus like common salt, are said to be neutral or to have a neutral reaction, A salty or saline taste is characteristic of most salts, and this property doubtless led to their classification with sodium chloride as a type, since this compound has been known for ages. Some compounds which are salts as far as their chemical relations are concerned do not have a neutral reaction. Thus sodium carbonate, which is the sodium salt of carbonic acid, is one of the most marked alkalies, being, in fact, known in commerce simply as alkali. ... 

Esters.—While not true alcohols, the phenols nevertheless possess alcoholic character as already referred to in speaking of their similarity to tertiary alcohols. This is shown in their formation of both esters and ethers. Esterification is as a rule less easy than with alcohols. Phenolates absorb carbon dioxide directly yielding a compound that is a mixed ester and salt of carbonic acid. 

The phosphorus oxychloride is used generally only when dealir with the salts of carbonic acids, upon which it acts as indicated by tl equation ... 

A weak acid formed by reaction of carbon dioxide with water. Both organic and inorganic carbonates are formed from it by reaction with organic compounds or metals, respectively. Thus inorganic carbonates (CaC03, K2C03, NajCOj, etc.) are salts of carbonic acid, and organic carbonates are esters of carbonic acid. 

Many acids, bases, and salts occur in nature and serve a wide variety of purposes. For instance, your digestive juice contains approximately 0.10 mole of hydrochloric acid per liter. Human blood and the aqueous components of most cells are mildly acidic. The liquid in your car battery is approximately 40% H2SO4 by mass. Baking soda is a salt of carbonic acid. Sodium hydroxide, a base, is used in the manufacture of soaps, paper, and many other chemicals. Drano is solid NaOH that contains some aluminum chips. Sodium chloride is used to season food and as a food preservative. Calcium chloride is used to melt ice on... 

On long standing, or when carbonyl chloride is treated with sodium ethylate, both chlorine atoms interact and an ethereal salt of carbonic acid, ethyl carbonate, results —... 

Synonyms/Trade Names Calcium salt of carbonic acid... 

BICARBONATE - An ion or salt of carbonic acid, containing hydrogen, carbon, and oxygen (HCO3), such as sodium bicarbonate, NaHCOs. 

So far as passivated Ag nanoparticles concerns, diere is known a convenient one-pot preparation method (14). Silver salt of carbonic acid such as myristote is heated at about 620 K without any solvent. Pyrolytically reduced Ag atoms then self-assemble to form metal clusters of about 5 nm in diameter, which are surrounded by remaining Ag myristate to form organo-passivated Ag nanoparticles with yield of 70 %. This type of self-organization may be called reaction-induced self-assembly. 

Carbonate minerals are the salts of carbonic acid (H2CO3), and the extensive possibilities for interchanging the more common metals, such as calcium, magnesium iron, and manganese, are realized in the wide variety of carbonate minerals that occur in nature. Consequently, it is not surprising that a wide variety of carbonate minerals also occurs in coals (Table 7.6). 

Sodium carbonate (1868) n. Na2C03. A sodium salt of carbonic acid used in making soaps and chemicals, in water softening, in cleaning and bleaching, and in photography. 

Despite this characteristic, salts of carbonic acid, such as Na2C03 and NaHCOj, are quite... 

---