"Micro Project Scientific Use of Chlorine-Containing Disinfectants" World of Elements and Materials PPT

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"Micro Project Scientific Use of Chlorine-Containing Disinfectants" World of Elements and Materials PPT

Part One: Preview of new knowledge

1.84 Disinfectant is a liquid disinfectant with 1___________ as the main component.

2.84 Precautions for using disinfectant

(1) 2___________, must be diluted before use, do not 3________.

(2) If the original solution comes into contact with the skin, immediately 4_____________.

(3) This product is not suitable for disinfection of 5___________ products.

(4) This product is easy to decolorize 6______ and is prohibited from being used for disinfection of silk, wool and linen fabrics.

(5) Store at 7_____________.

(6) Do not use this product at the same time as 8______ products (such as toilet cleaning products).

3. According to the instructions for use, it is inferred that the properties of 84 disinfectant are 9________, 10________, 11________, and 12___________.

4.84 Preparation of disinfectant solution: Pass chlorine gas into sodium hydroxide solution. The chemical equation of the reaction is 13_______________________________.

5.84 Working principle of disinfectant

The disinfection and bleaching effects of 84 disinfectant are not possessed by NaClO itself, but by 14________. The reaction that occurs in the air is NaClO+H2O+CO2===NaHCO3+HClO. HClO is a very weak acid, weaker than carbonic acid, but it has a very strong 15________, which can oxidize and denature most substances, so it can act. to disinfect.

Micro-project scientific use of chlorine-containing disinfectant PPT, part 2: key points and difficulties

Comparison of bleaching properties of several substances

Substance Activated Carbon Hypochlorous Acid Ozone Sodium (Hydrogen) Peroxide

Bleaching principle: adsorption of pigments; oxidative bleaching

Changes that occur Physical changes (reversible) Chemical changes (irreversible)

Chemical cleaning agents: clean and safe

There was a housewife who suddenly fainted while cleaning her home. The family immediately sent her to the hospital for rescue after discovering her. Tests on his blood and gastric juice confirmed that he was suffering from chlorine poisoning. It turned out that this housewife mixed bleaching powder and toilet cleaning spirit in order to obtain stronger stain removal ability. As a result, a chemical reaction occurred and chlorine gas was produced. Since chlorine gas is denser than air, it is deposited in the lower part of the small bathroom, causing poisoning accidents.

Micro project scientific use of chlorine-containing disinfectants PPT, the third part: learn and apply

1. The trademark of a certain 84 disinfectant indicates: ① This product is a colorless liquid, alkaline; ② Dilute with water when used; ③ It can disinfect tableware and clothes, and can bleach light-colored clothes. Its active ingredient is ()

A． CH3CH2OH B. KMnO4

C. NaClO D. C6H5OH

2. When raising goldfish in tap water, the tap water is usually sun-dried for a period of time before being poured into the fish tank. the purpose is()

A． Using ultraviolet light to kill bacteria in water

B． Raising the water temperature is beneficial to the growth of goldfish

C. Increase oxygen content in water

D. Promote the decomposition of hypochlorous acid in water

3. Chemistry is all around us. The following table shows two common detergents in life, and NaClO＋2HCl===NaCl＋Cl2↑＋H2O. Then the following statement is correct ()

Cleaner name: Toilet Cleaner 84 Disinfectant

Active ingredient HCl NaClO

A． Toilet cleaner can be used to remove rust from metal surfaces

B． Toilet cleaner can be used to clean marble floors

C. NaClO in 84 disinfectant is a salt, and the valence of the Cl element is -1

D. Displacement reaction occurs after mixing toilet cleaner and 84 disinfectant

4. The World Health Organization (WHO) classifies chlorine dioxide (ClO2) as a Class A highly efficient and safe sterilizing disinfectant. It is widely used in food preservation, drinking water disinfection, etc. From this, chlorine dioxide (ClO2) can be judged

A． It is a strong oxidizing agent

B． It is a strong reducing agent

C. is a salt

D. The chlorine element in the molecule has a valence of -1

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For more information about the PPT courseware "Scientific Use of Chlorine-Containing Disinfectants in Micro-Projects in the World of Elements and Matter", please click on the Scientific Use of Chlorine-containing Disinfectants ppt in Micro-Projects in the World of Elements and Matter.

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Update Time: 2024-11-07

This template belongs to Chemistry courseware Lu Ke Edition High School Chemistry Compulsory Course 1 industry PPT template

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