"Common Bases" PPT (Second Lesson)

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"Common Bases" PPT (Second Lesson)

Part One Content: Learning Objectives:

1. Know the characteristics of common bases;

2. Know the uses of common alkalis and explain related life phenomena.

Common bases PPT, part 2: Personality and uses of bases

Sodium hydroxide and calcium hydroxide have the same OH_ ions and have common characteristics; but they are composed of different metal ions and will show different properties.

(1) Sodium hydroxide NaOH

Commonly known as: caustic soda, fire soda, caustic soda

Properties: White translucent uniform granular or flake solid, easily absorbs moisture and carbon dioxide in the air, easily soluble in water, glycerin and ethanol.

1. Sodium hydroxide is easy to deliquesce

Deliquescence: When a substance is exposed to the air and absorbs moisture from the air, the surface becomes moist and gradually dissolves. This phenomenon is called deliquescence. Deliquescence is a physical change.

2. Sodium hydroxide is easily soluble in water

It releases a lot of heat when it dissolves.

3. Sodium hydroxide is highly corrosive

Sodium hydroxide is a strong base and highly corrosive. It must not come into contact with the skin and must be handled with caution during experiments.

4.Use of sodium hydroxide

An important chemical raw material, it is widely used in soap, petroleum, papermaking, textile, printing and dyeing and other industries.

(2) Calcium hydroxide

1. Commonly known as: hydrated lime or slaked lime;

2. Properties: White powdery solid, slightly soluble in water, the aqueous solution is lime water.

Solubility _____ with increasing temperature.

Ca(OH)2 is corrosive to a certain extent.

Common alkali PPT, part 3: Comparison of properties of NaOH and Ca(OH)2

Ionization equation NaOH = Na+ + OH- Ca(OH)2 = Ca2+ + 2OH-

Commonly known as fire soda, caustic soda, caustic soda, slaked lime, hydrated lime

Common bases PPT, part 4 content: Classroom exercises

1. Sodium oxide is commonly known as: ______, ______, ______. It is a white flaky solid that easily absorbs ______ in the air and deliquesces. It easily reacts with ______ in the air and deteriorates, so it should be stored ______. Very soluble in water, ______ a lot of heat when dissolved.

2. Calcium hydroxide is commonly known as: ______, ______. Calcium hydroxide ______ dissolves in water, and the aqueous solution is commonly known as ______.

3. Among the following descriptions of sodium hydroxide, which one is incorrect ( )

A. NaOH solid is very soluble in water and absorbs a lot of heat when dissolving.

B. Its aqueous solution has astringent taste and slippery feel

C. Strongly corrosive to skin and clothes

D. Its aqueous solution can turn purple litmus test solution blue

4. Which of the following gases can be dried with sodium hydroxide ( )

A.CO2 B.O2 C.SO3 D.HCl

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 (first lesson):

"Common Bases" PPT 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? Tip: For a class of objects...

"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: 2024-09-08

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

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