"Common Bases" PPT (first lesson)

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"Common Bases" PPT (first lesson)

Part One Content: Learning Objectives:

1. Deduce the common properties of bases through the physical and chemical properties of sodium hydroxide and calcium hydroxide.

2. Learn to use the relevant properties of alkali to explain relevant life phenomena.

What are the properties of bases?

Tips: Analyze typical substances in a class of substances and summarize their commonalities.

For example: when studying the properties of acids, it is obtained by analyzing hydrochloric acid and sulfuric acid.

Common bases PPT, part 2: common characteristics of bases

1. Use acid-base indicator to titrate sodium hydroxide solution and lime water and observe the color change?

2. Use pH test paper to test, what is the pH value of sodium hydroxide solution and lime water?

1. Function of alkaline solution and acid-base indicator

Why does it say "alkaline solution" here instead of "alkali" directly?

Because some bases are insoluble in water, such as copper hydroxide and ferric hydroxide, they cannot change the color of purple litmus test solution and colorless phenolphthalein test solution.

2. Reaction of soluble alkali and acid gas (non-metal oxide)

The waste gas emitted by factories that produce sulfuric acid contains sulfur dioxide that pollutes the environment. If the waste gas is passed through a sodium hydroxide solution, the content of sulfur dioxide can be greatly reduced.

(1) Properties of soluble bases

1. The role of soluble bases and acid-base indicators

Can turn purple litmus solution blue,

Can turn colorless phenolphthalein red.

2. Reaction of soluble bases with non-metal oxides

3. Reaction of base and acid solution

4. Reaction of soluble bases with certain salt solutions

(2) Common characteristics of insoluble bases

1. Reaction of insoluble base and acid solution

Common Alkali PPT, Part 3: Classroom Exercises

1. Hydrochloric acid, salt solution, and clarified lime water can be distinguished with one reagent. This reagent is ( )

A． Phenolphthalein B. Litmus test

C. Ferric chloride solution D. sodium hydroxide solution

2. After the reagent bottle containing lime water has been stored for a long time, there is often a white film on the inner wall. The best way to wash off this white film is ( )

A． Wash with water b. Wash with sodium hydroxide solution

C. Wash with hydrochloric acid D. Use hydrochloric acid first, then wash with water

3. When the following substances are exposed to the air, which one will react and increase in mass ( )

A. Sodium hydroxide B. Concentrated hydrochloric acid

C. Concentrated sulfuric acid D. Sodium chloride crystals

Keywords: Zhejiang Education Edition ninth grade science PPT courseware free download, common alkali PPT download, .PPT format;

For more information about the "Common Bases" PPT courseware, please click on the Common Bases ppt tab.

"Common Bases" PPT courseware:

"Common Bases" PPT Courseware Part One: Understanding Bases 1. Write the chemical formulas of the following bases: Sodium hydroxide Calcium hydroxide Copper hydroxide Iron hydroxide 2. What is an alkali? 3. Adding litmus to the alkali solution will change color to _____; adding phenolphthalein solution will cause _____ color. ..

"Common Bases" PPT (second lesson):

"Common Bases" PPT courseware Part One: Learning objectives: 1. Know the personality of common bases; 2. Know the uses of common bases and explain related life phenomena. ... ... ... Common alkali PPT, part 2: Personality and use of alkali Hydrogen...

"Several Common Bases" Acids and Bases PPT Courseware 4:

"Several Common Bases" Acids and Bases PPT Courseware 4 Knowledge Review Knowledge Point 1 Physical properties of sodium hydroxide and calcium hydroxide Sodium hydroxide: white solid, ____ dissolves in water and releases a lot of heat. Easily absorbs moisture and is highly corrosive. Calcium hydroxide: white...

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Update Time: 2024-11-23

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 1 industry PPT template

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