"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 2

Description

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 2

learning target:

1. Know the minerals of some common metals such as iron, aluminum, copper, etc., and understand the methods of reducing iron from iron ore.

2. Can perform relevant calculations on reactants or products containing certain impurities based on chemical equations.

Key points:

Calculations will be made based on chemical equations for reactants or products containing certain impurities.

The existence form of metal:

Elemental substance (a few, such as gold and silver)

Compounds (most, such as various iron ores)

Except for a few inactive metals such as gold and silver that exist in elemental form, the rest exist in the form of compounds.

Experimental Notes

Experiment sequence: ventilation----heating---stop heating---continue ventilation (carbon monoxide "comes out early and returns late" alcohol lamp "comes late and leaves early")

The purpose of introducing CO first is to exhaust the air in the glass tube to prevent explosion when CO is heated impurely.

The reason for removing the alcohol lamp first: to prevent the obtained iron from being oxidized.

2.Industrial ironmaking:

Raw materials: iron ore, coke, limestone

⑴Principle:

Coke reacts with O2 under high temperature conditions to generate CO, which is used as a reducing agent to reduce the iron in the iron ore under high temperature conditions.

Calculation of chemical equations for substances containing impurities:

In actual production, the raw materials or products used generally contain impurities. When calculating materials and output, impurities should be taken into consideration.

When listing proportions, be sure to use scalar quantities.

The relationship between impure substances, pure substances, and purity:

m(pure) = m(impure)×purity

m(impure) = m(pure) ÷ purity

Methods to prevent iron from rusting (just destroy the conditions for iron to rust): P20 table

1. Keep the surface of iron products clean and dry.

2. Apply oil, paint, enamel, plate corrosion-resistant metal, and bluing (that is, a dense oxide film protective layer is formed on the surface) on the surface of iron products to isolate the iron products from the air.

3. Make corrosion-resistant alloys, such as stainless steel, which are alloys made by adding a little nickel and chromium to steel.

feedback exercise

1. Under the following circumstances, the cast iron pipes buried underground will corrode the fastest: ( )

A. In moist, dense soil

B. In dry, dense soil

C. In moist, loose soil

D. In dry, loose soil

2. When an iron ship is driven in water, the most rusty part is ( )

A. The bow part of the ship on the water

B. The part of the hull near the water surface

C. The bottom part of the ship under the water surface

D. All parts rust at the same rate

3. Some iron products in daily life are often rusted.

Which of the following practices cannot prevent rust ( )

① Galvanize the surface of iron products

② Apply grease to the surface of iron products

③Retain the rust on the surface of iron parts as a protective layer

④Brush paint on the iron surface

⑤ Rinse the bicycle with clean water if it is dirty

⑥Use waste acid to flush iron sewage pipes

⑦After cutting the pickles, wash and dry the kitchen knife as soon as possible

A.②⑤B.③⑤⑥

C.①③⑦ D.②⑥⑦

1. Smelting iron ore into iron is a complex process. The main reaction principle is to use CO as a reducing agent under high temperature conditions to capture the oxygen in the iron ore and reduce the iron.

3CO+ Fe2O3==2Fe + 3CO2;

2. In actual production, the raw materials or products used generally contain impurities. When calculating materials and output, impurities should be taken into consideration.

When listing proportions, be sure to use scalar quantities. m(pure) = m(impure)×purity

3. The condition for iron to rust is that iron is in direct contact with oxygen and water (or water vapor) in the air. If the air and water are isolated, steel can be prevented from rusting to a certain extent. Oiling, painting, plating wear-resistant and corrosion-resistant chromium and making corrosion-resistant alloys, such as stainless steel, on the iron surface can prevent steel from rusting.

4Fe+3O2+2XH2O=2Fe2O3 · XH2O

4. Effective ways to protect metal resources are to prevent metal corrosion, recycle and utilize scrap metal, mine minerals reasonably and effectively, and find metal substitutes.

Keywords: metals and metal materials teaching courseware, metal resources utilization and protection teaching courseware, New People's Education Edition ninth grade chemistry PPT courseware volume 2, ninth grade chemistry slide courseware download, metals and metal materials PPT courseware download, metal resources Utilize and protect PPT courseware downloads, .ppt format

For more information about the PPT courseware "Utilization and Protection of Metal Resources of Metals and Metal Materials", please click the Utilization and Protection of Metal Resources ppt tab of Metals and Metal Materials ppt.

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 6:

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 6 1. Smelting of Iron 1. Raw materials: coke, limestone, iron ore pyrite FeS2, hematite Fe2O3, siderite FeCO3, magnetite Fe3O4 2. Principle : At high temperature, using coke and...

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 5:

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 5 Learning Objectives: 1. Know some common metal (iron, etc.) minerals and understand the methods of reducing iron from iron ore 2. Understand the factors that cause steel to rust Factors and methods to slow down steel corrosion..

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 4:

"Utilization and Protection of Metal Resources" Metal and Metal Materials PPT Courseware 4 Existence of metal resources: widely existing in the earth's crust and vast oceans. The way metal resources exist: a small number of very inactive metals (Au, Ag) exist in elemental form, and most metals...

File Info

Update Time: 2024-11-24

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

Preview