"Seawater "Sun Salt"" Chemistry in seawater PPT

Description

"Seawater "Sun Salt"" Chemistry in Seawater PPT, 22 pages in total.

learning target

1. Preliminarily understand the main methods of extracting salt from seawater, and master the basic principles of seawater sun salt;

2. Learn to use recrystallization to purify coarse salt mixed with sediment;

3. Understand the uses of table salt and the methods of industrially refining table salt.

1. The process of “salting” sea water

The method of extracting salt from seawater is the "salt field method", also known as the "solar evaporation method".

Thinking 1: In the above experimental process, what is the path for the sodium chloride solution to go from unsaturated to saturated? Can you visually tell when a solution is saturated?

Answer: The way is to reduce solvent;

The phenomenon of judging the saturation of a solution is that a small amount of crystals precipitate out of the solution.

2. Purification of coarse salt

Soluble impurities: magnesium chloride, calcium chloride, etc.

Insoluble impurities: sediment, etc.

Preliminary purification of coarse salt: (removing insoluble impurities)

(1) Instrument

Beaker, funnel, evaporating dish, glass rod, alcohol lamp, iron stand (with iron ring), pallet balance, measuring cylinder, rubber tip dropper.

Knowledge training

1. Which of the following analysis on the principle of seawater sun salting is correct ()

A. Use sunlight to heat sea water to obtain salt

B. Use sea breeze to cool down and precipitate salt crystals

C. Make salt by utilizing the decomposition reaction of seawater under sunlight

D. Use sunlight and wind to evaporate water to obtain salt

2. The current method of extracting salt from seawater is mainly to use seawater sun salt, and the material separation method it uses is ()

A. Dissolution method

B. Filtration method

C. Crystallization method

D. Distillation method

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

For more information about the PPT courseware "Chemistry of Seawater and Seawater Salt", please click on the Chemistry of Seawater PPT Seawater Salt PPT tab.

"Seawater "Sun Salt"" Chemistry in Seawater PPT Download:

"Seawater Sunshine" PPT download of chemistry in seawater, 29 pages in total. Learning objectives 1. Know that evaporation and crystallization are the basic principles of seawater sun salt. 2. Learn to use recrystallization to remove sediment from coarse salt. 3. Understand the methods of refining table salt. 4. Master the process of separation of mixtures..

"Seawater "Sun Salt"" Chemistry in Seawater PPT (Lesson 2):

"Seawater Sunshine" Chemistry in Seawater PPT (Lesson 2), 35 pages in total. New Knowledge Learning Knowledge Point 1 Factors Affecting the Solubility of Substances [Experimental Exploration 8-2] Factors Affecting the Solubility of Substances (1) Explore the influence of solvent types on the solubility of substances and complete the following experiments..

"Seawater "Sun Salt"" Chemistry in Seawater PPT (Lesson 1):

"Seawater Sunshine" Chemistry in Seawater PPT (Lesson 1), 26 pages in total. New knowledge learning Knowledge point 1 The process of seawater salting [Explanation] The process in which solid substances __________ from their saturated solutions in the form of crystals is called __________. Seawater sun salt belongs to ___..

File Info

Update Time: 2024-11-17

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

Preview