The solubility of NACL refers to the solubility of H2O to NA and cl?

The solubility of sodium chloride in water refers to the dissolution after the following dissolution equilibrium (reversible) is reached:

NaCl (solid).

na(+)cl(-)

C (Na+) in solution

c(cl-)

Constant. After equilibrium is reached, if the Na(+) concentration is increased, the Cl(-) concentration in the solution decreases, i.e., the NaCl solid will precipitate.

Chlorinated water. Pass into saturated saline and if there is enough raw material, more than one will build up in the solution. Chemical equilibrium.

cl2h2o

h(+)cl(-)

hclo2、hcl

h(+)cl(-)

3、nacl(s)

na(+)cl(-)

Obviously, all of these three equilibrium involve cl(-)1) and therefore sodium chloride.

Saturated solution. It inhibits the dissolution reaction of chlorine gas and the formation of hydrochloric acid.

2) However, due to the small amount of HCl, C(H+)C(Cl-) is in solution

Equilibrium is far from being reached, so HCl will be easily soluble;

3) The reaction between chlorine and water is inhibited because it is easy to reach saturation;

4) There should also be trace amounts of NaCl solids precipitated from the saturated sodium chloride solution, which will also be produced when they are formed by hydrochloric acid.

Chloride ions. Inhibits dissolution, even when solubility decreases.

Solubility can be said to refer to the mass ratio of Na+, Cl- to H2O in a saturated solution.

The presence of Cl- in saturated salt water inhibits the hydrolysis of Cl2 and reduces the solubility of Cl2, so it only absorbs HCl and almost no Cl2

Let's see what others have to say.

The solubility of the same substance in water is not the same at different temperatures. This is not based on the solubility of NaCl at 20 degrees is 36g, you can calculate what the solubility is at 35 degrees, and the two have nothing to do with each other. What is the specific solubility of 35 degrees, you can check the relevant solubility**.

In fact, the solubility of NaCl in water does not change much with temperature.

0 degrees Celsius: 10 degrees Celsius:

20 degrees Celsius

30 degrees Celsius

40 degrees Celsius

50 degrees Celsius:

60 degrees Celsius

70 degrees Celsius:

80 degrees Celsius

90 degrees Celsius

100 degrees Celsius

Summary. The solubility of NaCl, Kcl, NH4Cl and Kno3 in water is Kno3

The solubility of NaCl, KCl, NH4Cl and Kno3 substances in water is not obvious.

The solubility of NaCl, Kcl, NH4Cl and Kno3 in water is Kno3

The solubility of these substances is different depending on the temperature. At low temperatures, potassium nitrate solubility is minimal.

Why is n 36 and not 136?

36 is the mass of the solute, while 136 is the mass of the solution.

n=m m=36 The calculated data is the amount of solute substance. ok？

You want to say why soda ash (Na2CO3) can be prepared from NaCl. This is the classic principle of Hou's alkali making method.

Because, at the same temperature and pressure, the solubility of NaHCO3 in the above four salts is the smallest, according to the principle of solubility, when a variety of ions exist in the solution and can be combined with each other, the solubility of the combination is the least preferentially precipitated when the conditions change, so when the NaCl saturated solution, a sufficient amount of ammonia is passed first, and then a sufficient amount of carbon dioxide is passed, there are sodium ions, ammonium ions, chloride ions, and bicarbonate ions in the solution, and the solubility of NaHCO3 is the smallest after the combination of two pairs. After cooling, NaHCO3 was precipitated in large quantities, and NaHCO3 was heated and burned to obtain soda ash (Na2CO3).

The correlation equation is NaCl+NH3+CO2+H2O=NAHC3(!NH4Cl,2 NaHCO3 = Na2CO3 + CO2 (gas) + H2O

For NaHCO3, due to the intermolecular hydrogen bond of dimeric form between -HoCO2 and another -HoCO2 in its crystal structure, a certain amount of energy needs to be consumed when H2O acts, and the solubility is smaller than that of Na2CO3.

Generally speaking, the solubility of normal salt is greater than that of acid salt, because -OH in acid salt can form hydrogen bonds with water, and it is more difficult to dissolve, so normal salt is easier to dissolve than acid salt.

Further analysis:

Take the same volume and the same concentration of Na2CO3 and NaHCO3, if both are 100ml.

Na2CO3 hydrolysis is done in two steps: CO3 H2O HCO3 OH

Due to the presence of weak acid roots, the product NaHCO3 is unstable and continues to be hydrolyzed, HCO3 H2O H2O CO2 OH

So comics, 100ml of completely hydrolyzed consumed water .

Whereas, NaHCO3 is completely hydrolyzed in just one step:

hco3~＋ h2o ≈co2＋h2o＋oh~

Consumption of water . Comparing the two reactions, it is clear that the amount of water consumed to produce a stable substance is much less than that of the formula, so Na2CO3 is more soluble.

Solubility of ionic compounds.

The solubility of the crystal lattice energy is determined by the hydration energy of the ions disturbed by the lattice energy.

The lattice energy is large, and the solubility is small.

Ca(H2PO4)2 CaHPO4 Ca2(PO4)3 Soluble Insoluble Insoluble Insoluble.

Anion. The charge is high, the lattice energy is large, and the solubility is small.

The hydration energy is small, and the solubility is small. Alkali metals in general.

The salts are easily soluble in water, and only a few alkali metal salts are insoluble. These insoluble salts are generally composed of large anions, and the larger the alkali metal ions, the greater the number of insoluble orange salts, which is due to the fact that when the size of the anion and cation is very different, ionic hydration dominates the dissolution process.

If the hydration energy is small, the solubility is small. For example, alkali metal perchlorate solubility:

n aclo4＞kclo4＞rbclo4

In the same way, due to the increase of the radius of Mg2+ to Ba2+, the ionic potential decreases and hydrates.

Can it be reduced, then msso4 to baso4? fThe degree of resolution decreases.

The covalent component is large and the solubility is small.

The solubility of zns cds hgs decreases.

Soluble in dilute HCl, soluble in concentrated HCl, soluble in aqua regia.

This is due to the Zn2+, CD2+, Hg2+18 electronic configuration, not only strong polarization ability, but also strong deformation, with the increase of Zn2+, CD2+, Hg2+ radius, the deformability increases, the additional polarization effect increases, the covalent component increases, and the solubility decreases.

The degree of polymerization is large, and the solubility is small.

H3BO3 is a solid acid due to hydrogen bonding into large sheets, which has low solubility in cold water and is soluble in hot water.

The solubility of NaHCO3 is less than that of Na2CO3 due to the polymerization of NaHCO3 by hydrogen bonding.

You want to say why soda ash can be prepared with NaCl.

na2co3). This is the classic principle of Hou's alkali making method.

Because, at the same temperature and pressure, the solubility of NaHCO3 in the above four salts.

Minimum, according to the principle of solubility, when a variety of ions exist in the solution and can be combined with each other, the least solubility after the combination is preferentially precipitated when the conditions change, so when the NaCl saturated solution is introduced, a sufficient amount of ammonia in the cracked section is passed first.

Then pass a sufficient amount of dioxide to accompany the skin of carbon.

Finally, there are sodium ions, ammonium ions, chloride ions, and bicarbonate ions in the solution, and the solubility of NaHCO3 is the smallest after the combination of two pairs, and a large amount of NaHCO3 is precipitated after cooling, and the famous soda ash (Na2CO3) is obtained by heating and burning NaHCO3.

NaHCO3 = Na2CO3 + CO2 (gas) + H2O