| Category | Format | Size |
|---|---|---|
| Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 2 | pptx | 6 MB |
"Several Common Acids" Acids and Bases PPT Courseware
Description
"Several Common Acids" Acids and Bases PPT Courseware
1. Preparation before school
1.What is acid?
2. Write the ionization equation of hydrochloric acid, sulfuric acid and nitric acid.
2. Explore new knowledge
(1) Hydrochloric acid (HCl)
1. Physical properties of hydrochloric acid
Pure concentrated hydrochloric acid is colorless and has a pungent odor. It is a sour-smelling liquid and is a volatile acid that is corrosive.
Industrial hydrochloric acid appears yellow due to impurities such as iron ions.
2. Chemical properties of hydrochloric acid
(1).Reaction of hydrochloric acid and acid-base indicator
summary:
Purple litmus test solution turns red when exposed to acid; colorless phenolphthalein test solution does not change color when exposed to acid.
Application: Use acid-base indicators to distinguish acids and bases.
(2) Reaction between hydrochloric acid and metal
Summary: active metal + hydrochloric acid → salt + hydrogen
Application: Laboratory uses iron or zinc to react with acid to produce hydrogen.
(3) Reaction of hydrochloric acid and metal oxides
Summary: Metal oxide + hydrochloric acid → salt + water
Application: Use hydrochloric acid to remove rust from metal surfaces.
(4) Reaction of hydrochloric acid and alkali
Summary: hydrochloric acid + alkali → salt + water
Application: Use Weishuping [main component is Al(OH)3] to treat hyperacidity.
3. Class summary
1. Hydrochloric acid is a strong acid that can react with acid-base indicators, active metal elements, metal oxides, bases and certain salts (the properties determine the use of the substance);
2. Silver nitrate and dilute nitric acid can be used to test the presence of Cl;
3. Four basic reaction types of chemical reactions:
(1).Combination reaction: A + B === A B
(2). Decomposition reaction: A B === A + B
(3).Displacement reaction: A + BC === AC + B
(4).Metathesis reaction: AB + CD== AD + CB
4. Classroom exercises
1. Fill in the blanks:
(1). When the purple litmus test solution is dropped into the potassium hydroxide solution, it will show __ color, and when the colorless phenolphthalein test solution is dropped into it, it will show ____ color.
(2). When purple litmus test solution is dropped into hydrochloric acid, it will show __ color, and when colorless phenolphthalein test solution is dropped into it, it will show __ color.
(3). If you have excessive gastric acidity, you can take an appropriate amount of Weishuping. The main ingredient is aluminum hydroxide.
[ (3) Answer: ① Aluminum hydroxide can react with gastric acid (HCl) and consume excess gastric acid. ②6HCl+2Al(OH)3 =2AlCl3 + 6H2O ]
2. Multiple choice questions:
(1). The laboratory uses zinc or iron to react with acid to produce hydrogen. The acid that can be used is ( )
A. Concentrated sulfuric acid B. Dilute sulfuric acid
C. Concentrated hydrochloric acid D. Dilute hydrochloric acid
(2). The following substances can react with hydrochloric acid. Which one does not form a precipitate, does not release gas, and has a colorless solution ( )
A. Sodium carbonate B. Copper oxide
C.Sodium hydroxide D.Silver nitrate
5. Extracurricular homework
1. Questions 6 and 7 on page 160 of the textbook
2. Based on the knowledge we have learned, how can you determine whether the NaOH solution and hydrochloric acid have indeed reacted? Please explain why.
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For more information about the PPT courseware "Acids and Bases: Several Common Acids", please click on the Acids and Bases ppt: Several Common Acids ppt tag.
"Several Common Acids" Acids and Bases PPT Courseware 2:
"Several Common Acids" Acids and Bases PPT Courseware 2 Knowledge Review Knowledge Point 1 Properties of concentrated hydrochloric acid and concentrated sulfuric acid 1. Concentrated hydrochloric acid is volatile and can form _____ in the air, which is corrosive. 2. Concentrated sulfuric acid is easily soluble in water and has _____, ____ and corrosive properties..
"Several Common Acids and Bases" Initial Acids, Bases and Salts PPT Courseware 3:
"Several Common Acids and Bases" Initial Acids, Bases and Salts PPT Courseware 3 1. Several common acids: 1. Physical properties of concentrated hydrochloric acid and concentrated sulfuric acid [Review Questions] 1. What are acids and bases? 2. What are the composition characteristics of acids and bases? Observe P11 experiments 1, 2, and 3 and complete the following...
"Several Common Acids and Bases" Initial Acids, Bases and Salts PPT Courseware 2:
"Several Common Acids and Bases" Initial Acids, Bases and Salts PPT Courseware 2 Preparation before class 1. Write the chemical formulas of common acids in life 2. Complete the following equations Mg Al Zn Fe; iron oxide, copper oxide and dilute respectively Chemical equation for the reaction of hydrochloric acid and dilute sulfuric acid. one..
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Update Time: 2024-07-03
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