"Chemical Properties of Metals" PPT (Second Lesson)

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"Chemical Properties of Metals" PPT (Second Lesson)

Part One: Teaching Objectives:

1. Understand the activity sequence of metals through the reactions of typical metals with acids and certain salts;

2. Understand the characteristics of displacement reactions and understand the role of electrons in chemical reactions.

Chemical Properties of Metals PPT, Part 2: Activity Sequence of Metals

1. Compare the chemical activities of iron and copper, copper and silver

【Ask a question】

Which of the three metals, iron, copper, and silver, is the most mobile?

Which one is the weakest?

【Establish hypothesis】

A more mobile metal can displace another less mobile metal from an aqueous solution of its salt.

【design experiment】

(1) Comparison of the mobility of iron and copper: Dip a piece of clean (degreased and rust-removed) iron wire into a test tube containing copper sulfate solution, take it out after a while, and observe any changes?

(Other experimental plans are also possible)

(2) Comparison of the mobility of copper and silver:

(Design a feasible plan based on the drugs provided by the laboratory)

Dip a piece of clean (degreased and rust-removed) copper wire into a test tube containing silver nitrate solution. Take it out after a while and observe any changes.

Experimental conclusion: Metal activity: Cu>Ag

According to the above experimental facts, the chemical activity of iron, copper, and silver is ______________.

Chemical Properties of Metals PPT, Part 3: Thoughts and Discussions

1. How to design an experiment to compare the activities of magnesium, zinc, and copper, and list their activities in order from largest to smallest.

MgSO4, ZnSO4, and CuSO4 solutions can be used to contact Mg, Zn, and Cu to observe whether a displacement reaction can occur.

Example: Take magnesium strips and zinc particles and put them into zinc sulfate and copper sulfate solutions respectively to observe the changes in the experiment.

Experimental phenomenon: The surface of the magnesium strip is covered with silver-white solid, and the surface of the zinc particles is covered with red substance.

2. If hydrogen is also included, how should it be arranged?

Mg, Zn, and Cu were placed in test tubes containing dilute sulfuric acid to observe whether hydrogen gas could be produced.

Experimental phenomena:

Mg and Zn can react with dilute sulfuric acid to produce hydrogen, but Cu cannot.

Experimental conclusion: Mobility: Mg > Zn > (H) > Cu

Chemical Properties of Metals PPT, Part 4: Electron Transfer in Chemical Reactions

Put the metallic zinc into the copper sulfate solution and you will find that the surface of the silvery white metallic zinc is coated with a layer of purple-red copper.

Why do copper ions precipitate out of the solution and become metallic copper, while metallic zinc enters the solution into zinc ions?

Metal zinc loses electrons (electrons are represented by e-) and becomes zinc ions into the solution, while copper ions gain electrons and become metallic copper.

Metal zinc has a stronger ability to lose electrons than copper, or copper ions have a stronger ability to gain electrons than zinc ions, and the reaction occurs.

Chemical Properties of Metals PPT, Part 5: Classroom Exercises

1. The figure below shows the approximate years when the elements copper, tin, iron and aluminum in the metal activity sequence began to be developed and utilized on a large scale by humans.

Among the four elements of copper, tin, iron, and aluminum, ________ was the first to be developed and utilized on a large scale by humans, and the one that was last developed and utilized on a large scale by humans was ________.

Based on the data in the picture and relevant scientific knowledge, you think that the reason why the four elements copper, tin, iron and aluminum were developed and utilized on a large scale by humans at different times may be ______________.

2. Among the following groups of metals, the ones arranged in order from strong to weak metal activity are ( )

A.Na, Fe, Mg B.K, Cu, Fe

C.Al, Zn, Hg D.Ca, Ag, Zn

3. There are three metals: . Then the order of metal activity from strong to weak in X, Y and Z is ( )

A. Z, Y, X B. Y, Z, X

C. Z, X, Y D. Y, X, Z

4. When zinc reacts with dilute sulfuric acid, the quality of the solution will be - ( )

A． Increase b. reduce c. unchanged D. unconfirmed

Keywords: Zhejiang Education Edition ninth grade science PPT courseware free download, chemical properties of metal PPT download, .PPT format;

For more information about the "Chemical Properties of Metals" PPT courseware, please click on the "Chemical Properties of Metals" ppt tab.

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Update Time: 2024-07-29

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