"Marine Chemical Resources" Chemistry in seawater PPT download

Description

"Marine Chemical Resources" Chemistry in Seawater PPT download, 28 pages in total.

Executive summary

substances in sea water

seabed minerals

Desalination

learning target

1. Know that the ocean is a natural cornucopia for mankind, containing rich resources;

2. Understand the main substances contained in seawater and the seabed;

3. Through experimental research on seawater desalination, we know that distillation is the most commonly used method to desalinate seawater.

1. Substances in sea water

There are abundant elemental resources in the ocean

Thinking: There is already magnesium chloride in seawater. Why not directly electrolyze seawater to produce metallic magnesium?

1. The content of magnesium chloride in seawater is very low. If people want to obtain it, they must first enrich it.

2. The purpose of conversion to precipitation is not only to further enrich, but also to remove impurities such as sodium chloride.

2. Seabed minerals

There are hundreds of mineral resources under the sea

Natural gas hydrate is an ice-like solid formed from natural gas and water under low temperature and high pressure. Because it is extremely flammable, it is also called "flammable ice".

Advantages: high calorific value, no pollution.

Polymetallic nodules - minerals containing multiple metals, also called manganese nodules, containing more than 20 metal elements such as manganese, iron, nickel, copper, cobalt and titanium.

The total global reserves are more than 3 trillion tons.

3. Desalination

About 71% of the earth's surface is covered by water, and the ocean's water storage accounts for about 96.5% of the world's total water storage, but only 0.3% of the fresh water available for human use.

Knowledge training

1. Extracted from seawater and widely used in rocket, missile and aircraft manufacturing industries, what is called "defense metal" is ()

A. Ca

B. Mg

C.K.

D.Fe

2. The main component of "combustible ice" is hydrated methane crystals (CH4•H2O). Please combine your junior high school chemistry knowledge to determine which of the following statements is correct ()

A. Combustible ice can burn, indicating that water is flammable

B. The discovery of combustible ice has opened up broad prospects for my country's use of efficient new energy in the new century.

C. Combustible ice is composed of four elements

D. The main component of flammable ice is solid water

Keywords: free download of PPT courseware for the ninth grade of the May 4th Lujiao version of chemistry, marine chemistry resources PPT download, chemistry in seawater PPT download, .PPT format;

For more information about the "Chemistry in Seawater and Marine Chemical Resources" PPT courseware, please click on the "Chemistry in Seawater PPT Marine Chemical Resources PPT" tab.

"Marine Chemical Resources" Chemistry in Seawater PPT Teaching Courseware:

"Marine Chemical Resources" Chemistry in Seawater PPT teaching courseware, 36 pages in total. Materials in Seawater What materials can you see in seawater? [Information compilation] The most abundant substance in seawater is:______. The top two metal ions in content are:_____________.

"Marine Chemical Resources" Chemistry in seawater PPT:

"Marine Chemical Resources" Chemistry in Seawater PPT, 38 pages in total. New Knowledge Learning Knowledge Point 1 Materials in Seawater 1. Substances in seawater (1) The most abundant ions in seawater are ________. (2) The most abundant metal ion in seawater is ________. (3) The most in sea water..

File Info

Update Time: 2024-11-22

This template belongs to Chemistry courseware Lu Jiao Edition Ninth Grade Chemistry Volume 2 industry PPT template

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