"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware 2

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"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware 2

Preview of new knowledge

1. Common uses of salt

[Discrimination] Table salt and salt, soda ash and alkali.

The main component of table salt is NaCl, and salt is a classification of chemical compounds.

Soda ash is the common name of Na2CO3, and the other is commonly known as soda. The aqueous solution is alkaline, but soda ash is not an alkali but a salt.

2. Composition and classification of salt

1. Composition: Salt is generally composed of ___________ ions and ______ ions.

2. Classification

(1) According to different cations, salt can be divided into ____ salt, ____ salt, ____ salt, ____ salt, etc.

(2) According to different anions, salts can be divided into ________ salts, ________ salts, ________ salts, ________ salts, etc.

[Tips] Normally, most salts are solid, and many salts have beautiful and brilliant colors, such as: ferrous sulfate shows ______, copper sulfate crystal shows ______, potassium permanganate Show ______ etc.

3. Solubility of Salt

According to Appendix 1 summary:

Potassium, sodium, and ammonium salts are all dissolved, and nitrates leave no trace when exposed to water.

Sulfate does not dissolve barium sulfate, and chloride does not dissolve silver chloride.

Carbonates only dissolve potassium, sodium, and ammonium.

The solubility of alkali substances is only potassium, sodium, calcium and barium.

Interactive exploration

Explore point 1: Common salts and their uses

[Scenario Display]Understand the common uses of salt in life:

[Question Research]What are the uses of common salts such as sodium chloride, calcium carbonate, and sodium carbonate in life?

[Integrated improvement]Sodium chloride can be used as a condiment, to prepare physiological saline, and can be used to produce chemical raw materials such as hydrochloric acid and chlorine; sodium carbonate can be used as a detergent; marble is an important building material; baking soda is commonly used Used as flour starter; in agriculture, copper sulfate and slaked lime are commonly used to prepare Bordeaux liquid.

[Application Example]

Example 1 In daily life, we often encounter many kinds of salt, such as table salt, soda ash, marble, copper sulfate, potassium permanganate, baking soda, etc. Among these substances, ________ can be used as condiments, ________ can be used as detergents, ______ can be used as building materials, ______ can be used to prepare pesticide Bordeaux liquid, and can be used for pastry fermentation. The agent is ________.

Explore point 2: The composition and classification of salt

[Question Research]What are the characteristics of the composition of salt? How can common salts be classified?

[Inductive lifting]Salt is a compound composed of metal (or ammonium) ions and acid ions. It can be divided into a certain salt or a certain acid acid according to the metal ions and acid ions contained, and can also be divided into soluble salts and insoluble salts according to the angle solubility.

[Application Example]

Example 2 Each of the following substances belongs to the group of sodium salts ()

①KNO3　②NaCl　③CuSO4　④Na2CO3　⑤NaOH

A． ①②③ B． ②④⑤ C. ①②④ D． ②④

[Analysis] D Substances that are sodium salts must meet two conditions: one is to contain sodium ions; the other is to contain acid ions. Those that meet this condition are ② and ④.

[Method Instructions] Salt is a compound composed of metal (or ammonium) ions and acid ions. It can be divided into a certain salt or a certain acid acid according to the metal ions or acid ions contained; it can also be divided into soluble salts and insoluble salts according to the solubility.

On-site testing

Knowledge point 1 Common salts and their uses

1. Which of the following statements is incorrect ()

A． Snow on roads can be removed with sodium chloride

B． Sodium carbonate is widely used in the production of glass, paper, textiles and detergents

C. The Chinese watch in front of Tiananmen Square is made of marble. Calcium carbonate can also be used as a calcium supplement.

D． Hydrated lime can be used as a desiccant

[Analysis] D Quicklime (calcium oxide) can react with water and can be used as a desiccant.

2. It can make the bread loose and porous, and can also remove the acid in the dough. The substance may be ()

A． White sugar b. NaHCO3

C. NaOH D. acetic acid

[ Analysis

Knowledge point 2: The composition and classification of salt

3. Which of the following statements is correct ()

A． Salt can be eaten, so it is called table salt

B． Salt is table salt, easily soluble in water

C. Salt has a salty taste and is a white solid

D． Salt is a general term for a class of substances

[ Analysis The taste is not always white.

4． Classifying substances is a basic method for studying substances. Among the following four compounds, the one that does not belong to the same category as the other three is ()

A． MgSO4 B. NaNO3

C. NaHCO3 D. P2O5

[Analysis] D Phosphorus pentoxide is an oxide, and the others are salts.

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For more information about the PPT courseware "Common Acid and Base Salts and Commonly Used Salts", please click the Common Acid and Base Salts ppt and Commonly Used Salts ppt tag.

"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware 4:

"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware 4 Knowledge Review Knowledge Points 1 Uses of Several Common Salts Sodium Chloride (NaCl) Food Processing Seasoning, Medical Saline, Chemical Raw Materials, etc. Calcium Carbonate (CaCO3) Building Materials , calcium supplement, iron making, steel making...

"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware 3:

"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware 3 New Knowledge Preview - Chemical Properties of Salts Salt + Metal ______ + _________ CuSO4 + Fe==__________ + ____ In the order of metal activity, the metal element must be ranked among the metals in the salt. .

"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware:

"Commonly Used Salts" Common Acids, Alkalis, and Salts PPT Courseware Learning Objectives 1. Understand the uses of sodium chloride, sodium carbonate, calcium carbonate, and sodium bicarbonate in daily life; 2. Be able to classify salt according to the salt classification standards Classification; 3. Review the chemical properties of acids, alkalis, and metals..

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Update Time: 2024-09-08

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 2 industry PPT template

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