"Physical Properties and Certain Chemical Properties of Metals" Metals and Metal Materials PPT Courseware 3

Description

"Physical Properties and Certain Chemical Properties of Metals" Metals and Metal Materials PPT Courseware 3

【Experimental Supplies】

Test tubes, test tube clamps, alcohol lamps, batteries, wires, small light bulbs, matches.

Magnesium bars, zinc granules, aluminum flakes, iron flakes, iron powder, copper flakes, brass flakes (or cupronickel flakes), dilute hydrochloric acid, dilute sulfuric acid, copper sulfate solution, silver nitrate solution.

Other lab supplies you’ll need: ____________.

【Experimental steps】

1. Physical properties of metals

(1) Observe and describe the color and luster of magnesium, aluminum, iron, and copper.

(2) Use the method of mutual characterization to compare the hardness of copper sheets and aluminum sheets, copper sheets and brass sheets (or cupronickel sheets).

(3) Please design and conduct experiments to prove that metal has electrical conductivity (or thermal conductivity, ductility).

2. Chemical properties of metals

(1) Use crucible pliers to hold a piece of copper, place it on the flame of an alcohol lamp, heat it, and observe the changes on the surface of the copper piece.

(2) Put a small amount of magnesium strips, aluminum flakes, zinc granules, iron flakes, and copper flakes into 5 test tubes, then add 5 mL of dilute hydrochloric acid (or dilute sulfuric acid) respectively, and observe the phenomenon. If gas is generated, determine what gas is generated.

【Questions and communication】

Iron is a silver-white metal. In the above experiment, what color were the iron flakes and iron powder you observed? What questions do you have? Check information and communicate with classmates.

Iron powder: gray black

Iron sheet: silvery white

Because the iron powder is relatively fine, optical reasons cause diffuse reflection, and very little light can enter our eyes, so the iron powder appears black.

Class summary

1. Metal materials include two categories: metals and alloys; the common physical properties of metal materials: they have ______, are good conductors of ______ and ______, most metals are ______ color, except ______ , it is a solid at room temperature, has a relatively high melting point and boiling point, and has good ductility.

2. Compared with pure metals, the general strength and hardness of alloys are ______, melting point ______, and corrosion resistance ______. Alloys generally belong to ______ substances;

3. Chemical properties of metals:

(1) Can react with oxygen.

Example: ____________________.

(Write a chemical equation, the same below)

(2) Can undergo displacement reaction with acid (in solution).

Rule: metal + acid (dilute hydrochloric acid, dilute sulfuric acid) → salt + hydrogen

(3) Can undergo displacement reaction with salt (in solution).

Rule: metal A + salt (in solution) → new salt + metal B (activity: A > B)

Example: ____________________.

(Ancient hydrometallurgy of copper)

1. Write the chemical equation for the following reaction

1. Natural gas combustion

2. Ethanol combustion

3. Preparation of hydrogen in laboratory

4. Put quicklime into water

5. Put the iron nails into the copper sulfate solution

6. Put the copper wire into the silver nitrate solution

7. Put the aluminum pieces into dilute hydrochloric acid

8. Principles of smelting iron from iron ore (hematite)

2. Activity sequence table of common metals (represented by symbols)

1. In order to explore the reaction between three metals X, Y, and Z and acid, a school chemistry activity group conducted the following experiment: equal masses of X, Y, and Z were reacted with sufficient amounts of dilute sulfuric acid with the same solute mass fraction. , both generate sulfates of +2-valent metals, and the reaction conditions are shown in the figure. Among the following descriptions of the understanding of this image, which one is correct ( )

A. The mobility of metals from strong to weak: X, Z, Y

B. The mobility of metals from strong to weak: X, Y, Z

C, X, Y, Z may be Mg, Zn, Fe in order

D. Relative atomic mass: Z > Y > X

2. At room temperature, the four metals Fe, Cu, Zn, and Mg are placed in dilute hydrochloric acid of the same concentration. As shown in the figure below, the reduction of metals in acid is related to time. The four metals represented by the four lines are in order: MgZnFeCu

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For more information about the PPT courseware "Metals and Metal Materials Physical Properties and Some Chemical Properties of Metals", please click the Metals and Metal Materials ppt Physical Properties and Some Chemical Properties of Metals ppt tag.

"Physical Properties and Certain Chemical Properties of Metals" Metals and Metal Materials PPT Courseware 2:

"Physical Properties and Certain Chemical Properties of Metals" Metals and Metal Materials PPT Courseware 2 Search for Metals Around Us Which items around us are made of metal materials? Do you know what metal they are made of? Hands-on space 1. Try using copper sheets...

"Physical Properties and Certain Chemical Properties of Metals" Metals and Metal Materials PPT Courseware:

"Physical Properties and Some Chemical Properties of Metals" Metals and Metal Materials PPT Courseware Experiment Purpose 1. Consolidate and deepen the understanding of the properties of metals. 2. Cultivate experimental design capabilities. Experimental equipment: test tubes, test tube clamps, alcohol lamps, crucible tongs, batteries, wires, small lamps...

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Update Time: 2024-11-22

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 2 industry PPT template

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