Which acid is the least dense acid in liquor?

The BAI density of alcohol is 789 kg m (20).

The density of ethanol gas is , the relative density (, and the formula (relative fractional mass) is. The boiling point DAO is, and the melting point is. Pure ethanol is a colorless and transparent liquid with a special fragrance and volatile.

Ethanol is a good solvent that can dissolve many substances, so ethanol is commonly used to dissolve plant pigments or medicinal ingredients; Ethanol is also commonly used as the solvent for the reaction, so that the organic and inorganic substances participating in the reaction can be dissolved, the contact area is increased, and the reaction rate is increased.

1. Deliquescence.

The polarity of the hydroxyl group also makes many ionic compounds soluble in ethanol, such as sodium hydroxide, potassium hydroxide, magnesium chloride, calcium chloride, ammonium chloride, ammonium bromide and sodium bromide. However, sodium chloride and potassium chloride are slightly soluble in ethanol. In addition, its non-polar hydrocarbon group allows ethanol to dissolve some non-polar substances, such as most essential oils and many flavor enhancers, color enhancers and pharmaceutical reagents.

2. Chemical properties.

Acidity and alkalinity: Ethanol is not an acid (an acid in the general sense, it cannot discolor acid-base indicators, nor does it have the general properties of acids), and ethanol solutions contain polarized oxygen-hydrogen bonds, which generate alkoxy anions and protons (hydrogen ions) when ionized.

The pka= of ethanol is similar to that of water. Ethanol is weakly acidic, but the ionization equilibrium is present enough to allow the isotope exchange between it and heavy water to proceed rapidly.

3. Reducibility.

Ethanol is reductive and can be oxidized (catalyzed) to acetaldehyde or even further oxidized to acetic acid.

4. Chemical reaction.

Ethanol can react with sodium metal to produce hydrogen, but it is not as violent as water reacts with sodium metal. Sodium metal reacts violently with water, sodium melts, bubbles violently, and the heat generated by the reaction can make sodium burn; The reaction between ethanol and sodium metal is very slow, the shape does not change much, the bubbles are very slow, and the sodium metal sinks under the solution.

Density [mì dù].

Popular Science China |This entry is reviewed by the "Science Popularization China" Science Encyclopedia Entry Compilation and Application Work Project.

Density is a measure of the mass within a specific volume, density is equal to the mass of an object divided by volume, which can be expressed by symbols, in the International System of Units and the Chinese legal unit of measurement, the unit of density is kilogram meters3. [1]

Chinese name. Density.

Foreign name. density

Interpretation. The ratio of the mass to the volume of a substance.

Symbol. International Authorities.

kg m3 fast.

Navigation. Define the law of change in density, density and life applications, measurement methods, density and buoyancy, common material density.

Variants. Original:

Variants. Variants: 1

denotes density, m denotes object mass, and v denotes object volume).

Definition. The density of p at any point in an object is defined as:

where. v is the volume element containing the p-point;

m is the mass of the volume element. In the centimeter-gram-second system, the unit of density is gram centimeter3; In the International System of Units and the Chinese Legal Unit of Measurement, the unit of density is kilogram m3.

Densimeter. Rubber density meter.

The law of change in density.

Generally speaking, no matter what substance it is in, no matter what state it is in, with the change of temperature and pressure, the volume or density will also change accordingly. The relationship between the three physical quantities of temperature t, pressure p, and density (or volume) is called the equation of state. The volume of a gas varies significantly depending on the pressure it is subjected to and the temperature it is subjected to.

For an ideal gas, the equation of state is.

where r is the gas constant, which is equal to m2 (sec2*keon). If its temperature does not change, the density is proportional to the pressure; If its pressure is constant, the density is inversely proportional to the temperature. For general gases, if the density is not large and the temperature is far away from the liquefaction point, its volume changes with pressure and is close to the ideal gas; For gases with high density, the above equation of state should also be appropriately modified.

The density of a solid or liquid substance changes only slightly when temperature and pressure change. For example, around 0, the temperature coefficient (the rate of change in the volume of an object when the temperature increases by 1) is mostly around 10-9 for various metals. The pressure in deep water and the pressure under water** can reach several hundred atmospheres, or even higher (1 atmosphere = 101325 Pa), and the change in density with pressure must be taken into account.

Cole recommends the following equation of state.

Baijiu has the least density, followed by vinegar, water, and tea.

The proportion of alcohol in liquor is at least 25%, the proportion of organic acids in vinegar is 2 5%, and then water, tea is water to dissolve some substances in tea is the density increases. Although it does not dissolve much, it will increase its density.

One pound of liquor is equal to about 500 milliliters, and because it contains less dense alcohol, one pound of liquor is slightly larger than 500 milliliters. The density of liquor with different degrees is different, and the quality of liquor with different degrees is also different.

Baijiu contains 2 main ingredients, 1 is alcohol, 2 is water, and the liquor with an alcohol content of 45% is actually what we usually call a liquor with 45 degrees, and that percentage is the volume percentage of the two components. In 500 ml of wine: 225 ml of alcohol, 275 ml of water, mix well to become what you call this bottle of wine.

So what is the average amount of liquor to drink? It is best not to exceed 2 taels per day for liquor with higher degrees, and it is best not to exceed 3 taels per day for liquor with lower degrees.