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"Marine Chemical Resources" Chemistry in Seawater PPT teaching courseware, 36 pages in total.
substances in sea water
What materials can you see in sea water?
【Information compilation】
The most abundant substance in seawater is:______
The first two metal ions in content are:_____________
The most abundant non-metal ion is:__________
The main salts contained in sea water are: _______________, etc.
Magnesium alloy has high strength and good mechanical properties. These characteristics make magnesium metal an important material for manufacturing cars, airplanes, and rockets, thus gaining the reputation of "defense metal". Extracting magnesium from seawater is a major international trend.
seabed minerals
[Self-Study Guide 2] Seabed Minerals
Read textbook P61-62 and solve the following questions:
1. What mineral resources are contained in the seabed?
2. How is "combustible ice" formed?
3. Why is "combustible ice" known as "future energy" and "21st century energy"?
4. What are manganese nodules? What are the main elements contained in manganese nodules?
Desalination
The beautiful island country of the Maldives is surrounded by oceans, and all its domestic water comes from seawater desalination. How to desalinate seawater?
【doubt】:
How to prove that the distilled water is fresh water and does not contain NaCl?
Kind tips:
It is known that sodium chloride solution can react with silver nitrate solution to form a white precipitate. NaCl+AgNO3=AgCl↓+NaNO3
During the production process, tap water usually contains residual chloride ions (Cl-) due to disinfection. How to test it?
practise
1. Which of the following methods can desalinate seawater ( )
A. Filter sea water
B. Add activated carbon to seawater
C. Evaporate sea water
D. Distill sea water
2. What may cause marine pollution ( )
① Crude oil leakage from oil tankers at sea ② Factory sewage discharged into the ocean ③ Domestic sewage discharged into the ocean ④ Plastic packaging bags discarded into the ocean ⑤ Red tide
A. Only ①②③ B. Only ②③④
C. Only ③④⑤ D. ①②③④⑤
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 download:
"Marine Chemical Resources" Chemistry in Seawater PPT download, 28 pages in total. Summary of content Substances in seawater Seabed minerals Seawater desalination Learning objectives 1. Know that the ocean is a natural cornucopia for human beings and contains rich resources; 2. Understand the substances contained in seawater and the seabed..
"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..