Solubility of a substance in water, how the solubility of two substances dissolved in water changes

At a certain temperature), (the mass of a solid substance that dissolves when it reaches saturation in 100 g of solvent) is called the solubility of the substance. Solubility is a physical quantity that (quantitatively) indicates the solubility of a substance. The higher the solubility value, the more solubility (stronger) the substance is at that temperature.

Think of it this way, in order to achieve saturation, you either need to remove the solvent (then the remaining 90g in the question is saturated) or increase the solute (then 105g in the problem is saturated). Obviously, the removed solvent is a pure solvent, and the increased solute is also a pure solute, so you can directly add the 5g solute to the evaporated solvent, which can just be prepared into a saturated solution. Namely:

So the solubility is 50g

There is solubility. Such as alcohol and acetic acid.

miscible with water in any ratio; Most liquid organic compounds are poorly soluble in water.

1. The solubility of a solid substance refers to the number of grams dissolved by a substance when it reaches saturation in 100 grams of solvent at a certain temperature. In the absence of such an indication, solubility usually refers to the solubility of a substance in water. 2. The solubility of the gas usually refers to the gas (its pressure is 1 standard atmosphere.

The number of volumes dissolved in 1 volume of water at a certain temperature. Factors influencing solubility Whether a substance is dissolved or not, the size of the solubility depends on the nature of the substance; On the other hand, it is also related to external conditions such as temperature, pressure, solvent type, etc. Under the same conditions, some substances are easily soluble and others are difficult to dissolve, i.e., different substances have different solubility in the same solvent.

The ability of one substance to dissolve in another is usually referred to as solubility.

For example, sugars are easily soluble in water, while fats are poorly soluble in water because they are different in their solubility over water. Solubility is a quantitative representation of solubility. The solubility of a solid substance refers to the number of grams dissolved by a substance when it reaches saturation in 100 grams of solvent at a certain temperature.

In the absence of such an indication, solubility usually refers to the solubility of a substance in water. For example, at 20, the solubility of table salt is 36 grams, potassium chloride.

The solubility is 34 grams. These data can show that at 20 o'clock, the maximum dissolved amounts of table salt and potassium chloride in 100 g water were 36 g and 34 g, respectively. It also shows that at this temperature, table salt has a stronger solubility in water than potassium chloride. The solubility of the gas is also related to the pressure.

Solubility (symbol S) refers to the mass of solute dissolved by a solid substance when it reaches saturation in 100g of solvent at a certain temperature, which is called the solubility of the substance in this solvent. The solubility of the substance is a physical property made of reeds.

At a certain temperature and pressure, the highest amount of a substance dissolves in a certain amount of solvent. It is generally expressed in grams of dissolved substances in 100 grams of solvent. The solubility of a substance in a certain solvent is mainly determined by the properties of the solvent and the solute, that is, the dissolution equilibrium constant of the solute in the solvent.

For example, water is the most common and most commonly used solvent, methanol.

and ethanol can be miscible with water in any ratio. Most alkali metals.

Salts are soluble in water; Benzene is almost insoluble in water. The solubility of solids and liquids is largely unaffected by pressure, while the solubility of gases in liquids is directly proportional to the partial pressure of the gas. The solubility of substances is important for both chemistry and the chemical industry, in the recrystallization of solid substances.

The difference in the solubility of substances should be used in the process of fractional crystallization, preparation and separation of chemical substances, and separation of mixed gases.

Personal advice: Solubility is the ability of one substance to dissolve in another, usually expressed with rough concepts such as soluble, soluble, slightly soluble, insoluble, or insoluble. Solubility is a measure of the solubility of a substance in a solvent, and is a quantitative representation of solubility.

Yes, gases, liquids, and solids all have solubility. The solubility of solid and liquid solutes is usually expressed in grams of solute dissolved in 100 grams of solvent, and the solubility of gas solutes is commonly expressed in milliliters of gas dissolved in each milliliter of solvent. Eliminate and merge.

If the solubility of the two substances in water is relatively small and they do not react with each other. Solubility basically does not change.

If the solubility of the two substances in water is relatively large and they do not react with each other. The solubility will change considerably, and on the whole, the solubility of both substances will decrease significantly.

If one of the substances such as sodium hydroxide has a very large solubility in water, first prepare it into a saturated solution, and the stock of free water molecules in the water will be greatly reduced due to the formation of a similar adsorption process on the positive and negative ions, which will cause another substance such as sodium chloride or sodium carbonate to greatly reduce the solubility in the water and show an almost insoluble state.

To put it simply, there are different kinds of inorganic salts dissolved in water, and if there is no reaction between them, the dissolution of various salts will be reduced, and the salt with smaller solubility will be affected more.

Salts cannot be dissolved indefinitely in water.

The solubility written in the book refers to the solubility of a substance in 100 ml of pure water. When it's not pure water, that's a different story.

Formula: m (solute) m (solvent) = s (solubility) 100g (solvent) solute mass fraction in saturated solution = s (100g + s)] 100%.

Solubility refers to the number of grams of solute that can be dissolved when saturated in 100 grams of solvent at a certain temperature. Solubility, symbol S, at a certain temperature, the mass of the solute dissolved by a solid substance when it reaches saturation in 100g of solvent is called the solubility of the substance in this solvent. The solubility of a substance is a physical property.

The solubility is obviously affected by temperature, and the solubility of most solid substances increases with the increase of temperature. On the contrary, the solubility of gaseous substances decreases with increasing temperature.

The dependence of solubility on temperature can be expressed in terms of solubility curves. The solubility of NaCl increased slowly with the increase of temperature, the solubility of potassium Kno increased rapidly with the increase of temperature, and the solubility of NaSO sulfate decreased with the increase of temperature.

I'll do it anyway!

Sulfuric acid, alcohols with a carbon atomic number of 1 3: methanol, ethanol (alcohol), (iso)propanol.

Other alcohols: ethylene glycol, glycerol (commonly known as glycerol), etc.

Other organic substances: acetaldehyde, acetone, carboxylic acids with a carbon atomic number of less than 4, etc., can be miscible with water in any ratio at room temperature!

Solubility is only divided into size, not good or bad! And it only makes sense to compare the magnitude of solubility of the same substance in different solvents or at different temperatures. It makes no sense to compare the magnitude of solubility of different substances.

The solubility of a substance is the amount of solute contained in 100 ml of solution, but the solubility of a substance varies with its external conditions. Generally speaking, the solubility of a substance refers to the amount of solute in 100ml of solution at a temperature of +20 degrees Celsius at one atmosphere, measured in grams.

This belongs to the basic principle of precipitation-dissolution equilibrium, you are talking about the production of precipitation, and the dissolution theory of precipitation. Of course, there are small solubility converted into large solubility, which can be used by metathesis and redox reactions and many other ways, such as silver sulfide soluble in nitric acid, barium carbonate soluble in hydrochloric acid and so on.

At a certain temperature, measure 100 grams of solvent, then put in the solute, when the solution reaches the saturated state, use a balance to weigh the mass m of the saturated solution'Subtract the mass of the solvent by 100 grams to obtain the mass of the solute, which is the solubility of the substance at this time

The steps to measure the solubility of common substances are as follows:

1.Measure 100ml (can be scaled down) of water and beaker.

2.Weigh a certain mass of solute solid m (to ensure that the dissolution is incomplete, and the sum can be weighed many times when needed).

3.Add the solute gradually, stir constantly, and dissolve it well until it is just saturated (if there is a solid precipitate, filter it out and dry it, and put it into the undissolved solid).

4.Weigh the total mass of undissolved solids and find the dissolved solid mass in 100ml (100g) of water, which is the solubility of the solid at this temperature.

Note] Solubility corresponds to a certain value at a certain temperature, so the experiment should be performed at a specified temperature.

Potassium, sodium, ammonium salts are soluble; Nitrate enters the water without a trace;

insoluble lead sulphate and barium; There is also silver mercury chloride.

As for phosphate carbonates; The vast majority are insoluble.

Solubility table memory tips.

In the solubility table:

1) Most of the compounds formed by metal ions bound to chloride ions are soluble, only silver chloride is insoluble; (2) Most of the compounds formed by metal ions bound to carbonate ions are insoluble;

3) The compounds formed by metal ions combined with nitrate ions are soluble;

4) Most of the compounds formed by metal ions combined with sulfate ions are soluble, only barium sulfate is insoluble.