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

Description

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

Purpose

1. Consolidate and deepen your understanding of metal properties.

2. Cultivate experimental design capabilities.

Experimental equipment: test tubes, test tube clamps, alcohol lamps, crucible pliers, batteries, wires, small light bulbs, matches.

Experimental drugs: magnesium strips, 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.

You also need experimental supplies: hammer, aluminum wire, iron wire, copper wire, ferrous sulfate solution, lead battery, wires, electric keys, and small light bulbs.

1. Physical properties of metals:

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

Magnesium:_______; Aluminum:_______;

Iron:_______; Copper:_______.

(2) Use the method of mutual characterization to compare copper sheets with aluminum sheets, copper sheets with brass sheets

(or cupronickel sheet) hardness.

Hardness comparison: copper sheet __ aluminum sheet; copper sheet __ brass sheet (or white copper sheet).

(3) Experimental design of metal conductivity.

①Operation: Connect the aluminum wire, iron wire, copper wire and brass piece respectively as shown in the picture.

In the device, close the switch.

②Phenomena: The light bulb glows, indicating that the above metal has _______.

Question exploration

1. Students often drink drinks from cans. Some cans are made of aluminum and some are made of iron. Please use their physical properties to distinguish them.

Tip: Method 1: You can take two cans of similar size and weigh them with your hands. The lighter one is made of aluminum and the heavier one is made of iron.

Method 2: Compare the hardness. The one with higher hardness is made of iron, and the one with lower hardness and easier to deform is made of aluminum.

Method 3: Use magnets to attract two cans respectively. The one that can be attracted by the magnet is made of iron, and the one that cannot be attracted is made of aluminum.

(Other reasonable answers are also acceptable)

2. The appearance of fake gold (Cu, Zn alloy) is similar to gold. Please use three different methods to identify it based on the chemical properties of the metal.

Tip: Method 1: Burn, if the surface turns black, it is fake gold; if the surface does not change, it is real gold.

Method 2: Put it into dilute sulfuric acid. If bubbles appear on the surface, it is fake gold; if there is no change on the surface, it is real gold.

Method 3: Put it into CuSO4 solution. If the surface turns red, it is fake gold, otherwise it is real gold.

Experimental drill

1. The students expressed different opinions when discussing the common characteristics of metals. The correct one is ()

[Analysis] Choose C. Not contacting the actual production or life, but copying it mechanically, and making partial generalizations are all errors that some students are prone to make when answering this question. Some metals have lower melting points, such as metallic mercury, etc., Error A; some metals have smaller hardness, such as metallic sodium, etc., Error B; metals can have different lusters, such as metallic copper, which is purple-red, Error D.

2. Copper can be made into copper sheets or drawn into copper wires because copper has good properties (　)

A.Thermal conductivity B.Electrical conductivity

C.ductility D.metal mobility

[Analysis] Choose C. Copper can be made into copper sheets or drawn into copper wire because copper has good ductility. So choose C.

3. Put a spiral thin iron wire into the copper sulfate solution, as shown in the picture, and observe it after a long period of time ()

A. The surface of the iron wire is covered with a layer of red solid material

B. The solution changes from blue to colorless

C. A layer of black solid material was deposited at the bottom of the test tube

D. The surface of the iron wire is covered with a layer of silver-white solid material

[Analysis] Choose A. Iron is more mobile than copper. Put the thin iron wire into the copper sulfate solution to replace the red metallic copper, and the color of the solution gradually changes from blue to light green.

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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 3:

"Physical Properties and Some 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 strips, zinc granules, aluminum sheets, iron sheets, iron powder, copper sheets, brass sheets (or white copper sheets...

"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...

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Update Time: 2024-09-22

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

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