Can anyone give me the notes for the review of units 1 to 4 of Chemistry in the third year of junior

4. Important nutrients for human beings.

1. Protein.

2. Sugars: important components in human food, composed of three elements: C, H and O.

Main reaction: (C6H10O5) N + N H2O = N C6H12O6

Starch and glucose.

Enzyme C6H12O6 + 6O2 6CO2 + 6H2O+ energy.

3. Grease. 4. Vitamins.

5. Chemical elements and human health.

1. Macro elements: elements that exceed the content in the human body.

o c h n ca p k s na cl mg

2. Trace elements: elements with the following content in the human body.

fe cu cr mo i co zn mn f se

3. The constituent elements of the human body.

Calcium, sodium, potassium, iron, zinc, selenium, iodine, fluorine.

6. Organic synthetic materials.

1. Structure of organic matter: In addition to carbon, organic matter may also contain elements such as hydrogen, oxygen, chlorine, nitrogen and phosphorus.

2. Organic polymer compounds: the relative molecular weight is relatively large, from tens of thousands to hundreds of thousands, and even as high as millions or higher, such as starch, protein, etc.

3. Organic polymer materials:

Natural organic polymer materials: such as cotton, wool and natural rubber.

Synthetic organic polymer materials: such as plastics, synthetic fibers and synthetic rubber.

Three major synthetics: plastics, synthetic fibers and synthetic rubber.

4. Solve "white pollution".

Reduce the use of unnecessary plastic products, such as replacing plastic bags with cloth bags;

Reuse of certain plastic products such as plastic bags, plastic boxes, etc.;

the use of some new, degradable plastics, such as microbial degradable plastics and photodegradable plastics;

All kinds of waste plastics.

Read more textbooks and do more exercises.

Well, our teacher said, the high school entrance examination is a unit of three points at most... It's not very important, just know some basic concepts. "You should know after learning this lesson" at the back of each topic in the textbook、Understanding it is enough for you to take the high school entrance examination。。。

1.Alkali in addition to (NaOH), KOH), BA(OH)2), NH4OH [soluble, (Ca(OH)2

Slightly soluble, the rest are insoluble; Except for (AGCL), the chloride is insoluble, and the rest are soluble; Sulfate is insoluble except (baso4); Carbonate except (Na2CO3), K2CO3), NH4) 2CO3 [NH4HCO3 is also soluble] NaHCO3) soluble, the rest are insoluble.

Acid-base salt solubility formula: potassium hydroxide, barium hydroxide, sodium hydroxide soluble, calcium hydroxide slightly soluble, other alkalis insoluble. All nitrates are soluble.

Except for silver chloride, everything else in chloride is soluble. Barium sulfate is insoluble, calcium sulfate, silver sulfate is slightly soluble, and others are soluble. Ammonium carbonate, potassium and sodium salts are soluble in carbonate, magnesium carbonate is slightly soluble, and others are insoluble.

All ammonium, potassium, sodium salts are soluble. Silver hydroxide, aluminium carbonate, iron carbonate are absent. (This mantra is absolutely important, you must be familiar with it, and use it flexibly when solving problems).

,ba(oh)2,koh,nh4oh,ca(oh)2,agcl,baso4,na2co3,k2co3,(nh4)2co3,nahco3

And NH4NO3, which is the latter I don't know about the third year of junior high school - -ca(h2PO4)2, I don't know, KCL, I don't know.

3.enzymes, amino acids.

4.I don't know.

5.Cotton, linen, wool.