The common acids in our lives are , and their common characteristics are:

Acid: Chemically refers to a compound that is completely hydrogen when ionized in solution and can turn purple litmus solution red. In a narrow sense, it can also be divided into inorganic acids and organic acids. The acid-base proton theory holds that acid is a substance that can release protons, which is collectively called acid.

Common acids are: hydrochloric acid, sulfuric acid, nitric acid, carbonic acid, acetic acid, etc.; When they are ionized in solution, the cations are completely hydrogen ions, so acids all have some similar properties in common;

Acid generalities: 1) React with the indicator.

The purple litmus solution turns red when exposed to acid.

The colorless phenolphthalein test solution does not change color when exposed to acid.

2) Acid is displaced, and reactive metals (metals that are stronger than hydrogen in the order table of metal activity) are displaced. Metal. Salt.

Hydrogen. Example: 2HCl+Fe=FeCl2+H2 reacts with an alkaline oxide.

Basic oxides

Salt + water. 3H2SO4 + Fe2O3 = Fe2(SO4)3+3H2O4) reacts with certain salts. Sour. Salt.

New acid. New salt.

H2SO4+BACL2=2HCl+BaSO45) and the alkali have a neutralizing reaction acid. Alkali. Salt.

Water. 2hcl+ba(oh)2=bacl2+2h2o

The common acids in our lives are [hydrochloric acid, sulfuric acid, nitric acid, carbonic acid, acetic acid, etc.], and their common characteristics are: [when they are ionized in solution, the cation is completely hydrogen ion].

Vinegar.

Acids are also acids in compounds that produce all cations (H+) during ionization, or substances that dissolve in water and release protons to form H3O+ (hydronium ions). The higher the concentration of H3O+, the more acidic the solution becomes. H3O+ is present even in pure water at a concentration of 10-7mol L.

This is caused by protons running from one water molecule to another. Traditionally, the concentration of H3O+ has also depended on the concentration of hydrogen ions, although most of the hydrogen ions in aqueous solutions are in the form of H3O+.

Acids are a general term for a class of chemical compounds.

The narrow definition of acid in chemistry is: the cations ionized in an aqueous solution are all hydrogen ion compounds. Proposed by Arrhenius, this theory is known as Arrhenius' acid-base theory.

Broadly defined: a substance capable of accepting electron pairs.

Most of these substances are soluble in water, and a small part, such as silicic acid, is insoluble in water. An aqueous solution of an acid generally conducts electricity, and its conductive properties are related to its degree of ionization in water.

Some acids exist in the form of molecules in water and do not conduct electricity; Some acids dissociate into positive and negative ions in water, which can conduct electricity.

Common acids and alkalis in daily life are listed as follows:

Acid: vinegar (containing acetic acid, also called acetic acid), yogurt, formic acid secreted by ants, stomach acid, apples, grapes, lemons and other fruits. Various carbonated drinks such as Coke, Sprite, etc.

Alkali: soda (sodium carbonate), lime (calcium carbonate), laundry detergent, soap, toothpaste, milk, human saliva, healthy urine, etc. A lot.

1. There is acetic acid in vinegar.

2. There is lactic acid in yogurt, and the main harmful substance of tooth decay is lactic acid.

3. There is oxalic acid in green onions, which combines with calcium to form calcium oxalate that is not easy to digest and absorb.

4. There are free fatty acids in edible oil, including saturated fatty acids, unsaturated fatty acids, etc.

5. Dark green leafy vegetables, carrots, egg yolks, apricots, pumpkin, beans, etc. contain folic acid.

6. The protein that is composed of amino acids is amino acids.

Common acids are sulfuric acid, nitric acid, hydrochloric acid and acetic acid (in addition to hydrofluoric acid and hypochlorous acid), according to the general properties of acids, they can neutralize with alkaline substances, and can be with metals (according to the activity of metals, the metals in front of hydrogen can react with acids to replace hydrogen, and the metals behind hydrogen can not replace hydrogen from acids but generate water!). ) reaction to displace hydrogen molecules to form salts and lose acidity!

These acids are all toxic to the human body, but the most toxic is hydrofluoric acid (gas is harmful to the human body), the most oxidizing is hypochlorous acid, followed by nitric acid, and the "aqua regia" composed of a mixture of nitric acid and hydrochloric acid is one of the strongest oxidants produced by human beings, which can dissolve gold! The acetic acid (brewed) is often said to be vinegar, and industrial acetic acid (glacial acetic acid) is inedible!

1. It can make the indicator color (purple litmus is red);

2. It can react with alkali to form salt and water;

3. It can react with metal oxides to form salt and water;

4. It can react with metals to generate salts and hydrogen (non-reducing acids and active metals);

5. It can react with some salts to form new salts and new acids.

Among the organic acids, its taste characteristics are more sour and sweet, which is (Qi Zhao).

a.Hexylic acid. b.Acetic acid.

c.Lactic acid (correct answer to the case).

d.Butyric acid.

Different acid solutions contain the same hydrogen ions, so acids have similar chemical properties.

For example, hydrochloric acid contains hydrogen ions and chloride ions, and sulfuric acid solutions contain hydrogen ions and sulfate ions, and their solutions all contain the same hydrogen ions, so they can all react with acid-base indicators, active metals, basic oxides, bases and salts, and have similar chemical properties.

Both contain the same cation in the aqueous solution of the acid: H.

There is (sulfuric acid) in the car battery, and acid rain contains a small amount (sulfuric acid, carbonic acid, nitric acid).

The car contains ( ) and citric acid.

The cause of acid rain is a complex atmospheric chemical and atmospheric physical phenomenon. Acid rain contains a variety of inorganic and organic acids, most of which are sulfuric acid and nitric acid, and a small amount of dust.

In addition, there are other acidic gases that dissolve in water to cause acid rain, such as hydrogen fluoride, fluorine gas, chlorine, hydrogen sulfide and other acidic gases.

Please adopt it promptly if you understand!! Good luck with your progress!!

Sulfuric acid, carbonic acid, sulfurous acid, or nitric acid.

Please explain the third space.

Sulphuric acid. Sulfuric acid, sulfurous acid. Carbonic acid.

1. It can make the indicator color (purple litmus is red);

2. It can react with alkali to form salt and water;

3. It can react with metal oxides to form salt and water;

4. It can react with metals to generate salts and hydrogen (non-reducing acids and active metals);

5. It can react with some salts to form new salts and new acids.