The Construction of Chemistry Courseware in Junior High School

/down.asp？ cat _ id = 3 & ampclass_id=57

Expression of solution composition in junior middle school chemistry courseware

The composition of the solution represents the solution in life: definition: the dissolved substance is called solute, and the dissolved substance is called solvent. Solution mass = solute mass+solvent mass. Solution composition: Solute can be solid. ......

Software size: unknown authorization method: free download: 745 recommendation:

"Junior high school chemistry" ninth grade chemistry unit 6 second question

The new curriculum standard of nine-year compulsory education: Research on carbon dioxide production (1) Understand the principle of carbon dioxide production in the laboratory. Teaching objective (2) To explore the device for producing carbon dioxide in the laboratory and use the designed device to produce carbon dioxide. (4) through the laboratory. ......

Software size: unknown authorization method: free download: 2556 recommendation:

The first volume of junior high school chemistry in the ninth grade (People's Education Edition)

Teaching material analysis and Classroom Teaching Design Gu teaching material analysis's Complete Works in Wenfeng Middle School, Yancheng City, Qin Yi can be divided into Volume I (7 units) and Volume II (5 units): ☆ ... Some people say that chemists are engaged in God's work, because chemists not only care about nature. ......

Software size: unknown authorization method: free download: 3 179 recommendation:

Chemistry teaching material analysis of Grade 9 in Junior High School Chemistry

Chemistry in junior high school New teaching material analysis Liu Zhong Luo Hong in Yichang City, Hubei Province has seven units. The first unit enters the world of chemistry-● Pay attention to students' life experience and personal feelings, pay attention to guiding students to actively participate in inquiry activities, and cultivate students' closeness and love for chemistry. ......

Software size: unknown authorization method: free download: 1535 recommendation:

The ninth grade unit of junior middle school chemistry enters the chemical world

The first part of Unit 1 Go into the chemical world topic 3 Go into the chemical laboratory and name the following instruments: Test tube alcohol lamp beaker iron rack sink set ... 7. When you need to prepare a solution with 90 g distilled water in a chemical experiment, take it. ......

Software size: unknown authorization method: free download: 2822 recommendation:

Junior High School Chemistry Grade 9 Chemistry Volume 1 1 yuan

Eleventh Yuan Salt Fertilizer Project Volume I 1 Common salt in life refers to salt, and students may immediately think of salt. In fact, in chemistry, salt refers to a class of compounds, that is, compounds containing metal ions and acid ions, such as sodium chloride, copper sulfate and carbon. ......

Software size: unknown authorization method: free download: 12 19 recommendation:

Review of Chemistry Acid, Alkali and Salt in the Ninth Grade of Junior Middle School

Nine-year chemical review of acid, alkali and salt II. Relationship among simple substance, oxide, acid, alkali and salt 1. Composition and classification of acid, alkali and salt ... judge whether the following substances can react chemically, if so, write the chemical equation, if not. ......

Software size: unknown authorization method: free download: 2 158 recommendation:

Junior high school chemistry ninth grade unit 9 chemistry

Solution, Emulsion and Suspension Liu Jun, Grade Two, Foshan No.3 Middle School, the content and objectives of this section are to further understand the concept of solution, the characteristics of emulsion and suspension, distinguish the three kinds of mixtures of solution, emulsion and suspension, and understand the wide use of emulsion and suspension. .......

Software size: unknown authorization method: free download: 1328 recommendation:

The first section of the fifth chapter of the ninth grade chemistry teaching edition of junior middle school chemistry

Donggang city Xinli Middle School Shen Qingjie teaching material analysis: The fifth chapter is the first time to systematically study and understand the properties, preparation, existence and uses of metals and their compounds in textbooks. ......

Software size: unknown authorization method: free download: 955 recommendation:

Unit 5 Chemical Equation in Junior High School Chemistry Courseware

Unit 5 Chemical Equation Project 1 Law of Conservation of Mass The essence of chemical reaction is to generate new substances. It is known that the species of substances have changed before and after the reaction, so has the total mass of substances changed before and after the chemical reaction? Think about it. .........

Software size: unknown authorization method: free download: 1684 recommendation:

Junior high school chemistry calculation problems

Courseware production: Cao in Xiushan No.1 Middle School, chemical formula 1 calculation example. In the mixture of FeSO4 and Fe2(SO4)3, the mass fraction of sulfur is a%, and the mass fraction of iron is () a, 1-A% B, 1-3A% C, ......

Software size: unknown authorization method: free download: 23 18 recommendation:

The third chapter courseware of junior middle school chemistry

Section VI Making of Valence Courseware: Ma Chunsheng Multimedia Courseware of Nanjing No.50 Middle School C:\ My Document \ Courseware Valence \ Beethoven's "To Alice" ... The writing principle of chemical formula is based on objective facts and cannot be fabricated. ......

Software size: unknown authorization method: free download: 14 14 recommendation:

Junior High School Chemistry Chapter 4 Chemical Equation

Chapter IV Chemical Equation Section III According to the calculation of chemical equation, the learning goal 1+0 1 was set in June 2004. On the basis of understanding the meaning of chemical equations, the calculation of the mass of reactants and products is mastered. ......

Software size: unknown authorization method: free download: 234 1 recommendation:

Experiment on chemical properties of dilute sulfuric acid and dilute hydrochloric acid in junior middle school chemistry courseware ..

Chemical properties experiments of dilute sulfuric acid and dilute hydrochloric acid: the reaction of dilute hydrochloric acid with limestone, the reaction of rust with dilute sulfuric acid and dilute hydrochloric acid, and the reaction of magnesium strip, zinc particle and copper sheet with dilute sulfuric acid and dilute hydrochloric acid respectively. Conclusion (Chemical Equation) Experimental phenomenon Experimental content: The surface of zinc particles is covered with magnesium strips. ......

Software size: unknown authorization method: free download: 13 1 1 recommendation:

The mystery of the composition of ionic substances in junior middle school chemistry courseware 3

The mystery of matter composition III. Can you pass the following statement? 1, water is composed of hydrogen and oxygen. 2. Water is composed of water molecules. 3. Water molecules are composed of hydrogen atoms and oxygen atoms. A water molecule consists of two hydrogen atoms and one oxygen atom. ......

Software size: unknown authorization method: free download: 923 recommendation:

Atomic composition in junior middle school chemistry courseware

There are similarities and differences between atoms and molecules. The difference between atoms and molecules is defined as 1, which has a certain size of 2, and there is an interval between them. 3, which means that the same point that makes up the particles is undergoing chemical changes. ......

Software size: unknown authorization method: free download: 1020 recommendation:

Salt in junior middle school chemistry courseware life

Eleventh yuan salt and fertilizer project 1 Common salt in life refers to salt, and students may immediately think of salt. In fact, in chemistry, salt refers to a class of compounds, that is, compounds containing metal ions and acid ions, such as sodium chloride, copper sulfate and sodium carbonate. ......

Software size: unknown authorization method: free download: 880 recommendation:

Elements of Junior High School Chemistry Courseware

1, the experiment of electrolyzing water shows what water is made of and what element 2 is. Write the chemical symbols of water, carbon dioxide, oxygen and potassium chlorate. Please consider what these symbols have in common. What is the relative atomic mass? ...

Software size: unknown authorization method: free download: 8 19 recommendation:

The mystery of material composition in unit 4 of junior middle school chemistry courseware

Unit 4 Mystery of Matter Composition Unit 4 Chemical Formula and Valence You can know the following symbols of elements ... Chemical Formula Note: It is necessary to consider whether the particles that make up the matter are molecules or atoms. Carbon dioxide is a substance. ② Carbon dioxide consists of carbon and oxygen. ......

Software size: unknown authorization method: free download: 1 129 recommendation:

Junior high school chemistry courseware Unit 2 The air around us

Unit 2 The topic of air around us 3 Thinking about making oxygen We know that oxygen is a chemically active gas, which can react with many substances. So how did we get the oxygen used in the experiment? ......

Software size: unknown authorization method: free download: 1656 recommendation:

Junior high school chemistry unit 5 chemical equation. Theme 1 Law of Conservation of Mass

The essence of chemical reaction is to produce new substances. The species of known substances changed before and after the reaction. ...

Software size: unknown authorization method: free download: 1023