"Oxidant and Reducing Agent" Redox Reaction PPT

Description

"Oxidant and Reducing Agent" Redox Reaction PPT

Part One: Goals and Competencies:

1. Understand basic concepts such as oxidants, reducing agents, oxidizing properties, and reducing properties. (Macroscopic identification and microscopic analysis)

2. Understand common oxidants and reducing agents. (Macroscopic identification) 3. Understand the application of redox reactions. (Scientific attitude and social responsibility)

PPT on oxidizing agents and reducing agents, part 2: independent preview to explore new knowledge

1. Oxidizing agent and reducing agent

1. concept

(1) Oxidizing agent: The substance that _______________ in the reaction.

(2) Reducing agent: a substance that _______________ in the reaction.

2. connect

3. Common oxidizing and reducing agents

Micro tip: To understand the concepts related to redox reactions, we need to grasp two lines:

①The valence of the reducing agent increases→loses electrons→an oxidation reaction occurs (is oxidized)→generates oxidation products.

② The valence of the oxidant decreases → electrons are obtained → a reduction reaction occurs (is reduced) → a reduction product is generated.

2. Oxidation and reduction

1. Oxidation and reduction

(1) Oxidizing property: Indicates the strength of the oxidizing agent's ability to _______.

(2) Reducibility: Indicates the strength of the reducing agent _______.

2. The relationship between oxidizing properties, reducing properties and valence of elements

3. Oxidation-reduction reactions in production and life

1. Positive effects: metal smelting, electroplating, fuel combustion, photosynthesis of green plants, etc.

2. Negative effects: spontaneous combustion of flammable materials, food spoilage, steel corrosion, etc.

PPT on oxidizing agents and reducing agents, part three: core breakthroughs and overcoming difficulties

Comparison of the oxidizing and reducing properties of substances

1. Comparison based on the redox reaction equation

Oxidizing agent + reducing agent → reduction of the reduced product + oxidation of the oxidized product

Oxidizing properties: oxidant > oxidation products; reducing properties: reducing agent > reduction products.

2. Determine based on the order of metal activity

3. Comparison based on the degree of redox reaction

When different oxidizing agents react with the same reducing agent, the greater the increase in the valence of the reducing agent, the stronger the oxidizing property of the oxidizing agent.

4. Comparison based on reaction conditions and reaction severity

The lower the reaction conditions, the more violent the reaction, and the stronger the oxidizing or reducing properties of the corresponding substance, such as whether it is heated, the reaction temperature, the presence or absence of catalysts, and the concentration of reactants, etc.

PPT on oxidizing agents and reducing agents, part 4: meeting standards in class and improving quality

1. Calcium hydride can be used as a hydrogen generating agent (the hydrogen element in CaH2 is -1). The reaction equation is as follows: CaH2+2H2O===Ca(OH)2+2H2↑, where H2 is ()

A. Both oxidation and reduction products

B． is an oxidizing agent

C． It's a reducing agent

D． Both oxidant and reducing agent

A. During the reaction, the hydrogen element in CaH2 increases from -1 to 0, and the hydrogen in H2O decreases from +1 to 0. Hydrogen is both an oxidation product and a reduction product. ]

2. In the following reactions, carbon dioxide is used as the oxidant ()

A. Ca(OH)2+CO2===CaCO3↓+H2O

B． CO2＋C=====High temperature 2CO

C． 2Fe2O3＋3C=====High temperature 4Fe＋3CO2↑

D． CuO＋CO=====△Cu＋CO2

B [In option A, there is no change in the valence of carbon in carbon dioxide; in option B, the valence of carbon in carbon dioxide is reduced from +4 to +2, serving as an oxidant; in options C and D, carbon dioxide is an oxidation product. ]

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For more information about the PPT courseware "Oxidants and Reducing Agents in Redox Reactions", please click the Oxidizing and Reducing Agents ppt tag in Redox Reaction ppt.

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Update Time: 2024-08-16

This template belongs to Chemistry courseware People's Education Press High School Chemistry Compulsory Course I industry PPT template

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