"Several Common Salts" Salt PPT Courseware 2

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"Several Common Salts" Salt PPT Courseware 2

Salt is the product of the neutralization of acid and alkali. It is formed by combining the acid anion in the acid and the metal cation in the base.

Thinking: Is the salt we are talking about now the table salt we usually eat?

No, salt is a type of substance, which includes many types. Table salt is just one of them. Many salts in nature are crystals.

1. Table salt NaCl

How much do you know about table salt? Tell me!

1. What is the chemical name of table salt? What is the color and condition? Can it be dissolved in water? What is the pH of its aqueous solution?

2. How is salt distributed in nature? Where does it mainly exist?

3. What is the use of sodium chloride?

4. Chemical properties of sodium chloride:

NaCl+AgNO3===

2. Sodium carbonate (soda ash or soda Na2CO3)

1) Experiment: Take an appropriate amount of Na2CO3 solution in a test tube, and drop phenolphthalein test solution into the test tube. Phenomenon: ＿＿＿＿It can be seen that the Na2CO3 aqueous solution is ＿＿.

2) Because its aqueous solution is alkaline, it is called soda ash;

Soda ash is not an alkali but a salt

3) Usage: Half of the output is used for making glass, steaming steamed buns, cooking porridge, using alkaline to make soap, paper making, textiles, etc.

Thinking: Why can baking soda be used to remove the sour taste and make the steamed buns porous and soft?

Na2CO3 + 2 HCl==2 NaCl + H2O + CO2↑

3. Sodium bicarbonate (baking soda NaHCO3)

1) Take an appropriate amount of NaHCO3 in the test tube and observe its color and state.

2) Add dilute hydrochloric acid to the test tube, quickly insert the rubber stopper with the catheter into the mouth of the test tube, pass the other end of the catheter into the clear lime water, and observe the phenomenon.

3) Usage: used as baking powder for baking cakes and used to treat hyperacidity

4. Calcium carbonate (CaCO3)

1). White and pure calcium carbonate rock is called white marble.

2) Calcium carbonate with patterns due to impurities is called marble.

3). The dense calcium carbonate rock is called limestone.

On-site training

1. Which of the following compounds is a salt ( )

A.NaOH B.H2SO4 C.CaO D.CuSO4

2. Sodium chloride is commonly known as _____, its chemical formula is _____, its aqueous solution is _____, PH_____7.

3. Which of the following substances’ names, common names, and chemical formulas all match?

A. Sodium hydroxide. Salt. NaCl B. Calcium oxide, slaked lime, CaO

C. Sodium carbonate. Soda ash. Na2CO3 D. Sodium bicarbonate, soda, NaHCO3

4. Sodium carbonate is a _____-colored solid substance that easily _____ water, and its aqueous solution exhibits _____ properties.

5. Which of the following substances can turn colorless phenolphthalein test solution red ( )

A. Salt water B. Dilute sulfuric acid C. Sodium carbonate solution D. Hydrochloric acid

Explore: How to identify sodium chloride solution and sodium carbonate solution?

1. Phenolphthalein test solution. The red one is sodium carbonate solution and the colorless one is sodium chloride solution.

2. pH test paper pH>7, sodium carbonate solution pH=7, sodium chloride solution

3. Dilute hydrochloric acid. If there are a lot of bubbles, it is a sodium carbonate solution. If there is no obvious phenomenon, it is a sodium chloride solution.

4. Calcium hydroxide solution. If there is white precipitate, it is sodium carbonate solution. If there is no obvious phenomenon, it is sodium chloride solution.

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For more information about the PPT courseware "Salt: Several Common Salts", please click on the Salt ppt: Several Common Salts ppt tag.

"Several Common Salts" Salt PPT Courseware 3:

"Several Common Salts" Salt PPT Courseware 3 Knowledge Review Knowledge Point 1 Sodium Chloride 1. Sodium chloride is _________ crystal, ____ is soluble in water, has a salty taste, melting point is 801℃, boiling point is 1413℃, The solution is ____ and is the main component of _____. 2.Sodium chloride occurs naturally..

"Several Common Salts" Salt PPT Courseware:

"Several Common Salts" Salt PPT Courseware 1. Sodium chloride (the main component of table salt) 1. Physical properties: white crystal, easily soluble in water (its solubility does not change much with temperature). 2. Preparation method: Generally, the solvent evaporation method is used. 3. Usage: kitchen condiment..

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Update Time: 2024-11-16

This template belongs to Chemistry courseware Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 2 industry PPT template

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