【人教版】Junior High Chemistry Grade 9 Volume 2
This course covers the core content of the second semester of Grade 9 Chemistry in junior high school, including the properties and uses of metal materials, the formation and properties of solutions, chemical reactions of acids and bases, the application of salts and chemical fertilizers, as well as the close connection between chemistry and daily life. The course emphasizes experimental inquiry and the integration of theory with practice.
Lessons
Lesson
本单元介绍了金属材料的演进史及其在社会发展中的核心价值，重点探讨了金属的物理共性、化学活动性以及合金通过微观结构重构实现性能优化的科学原理。学习目标在于掌握金属材料的选择逻辑，理解“性质决定用途”的综合评估模型，并能运用化学方程式分析金属与酸、盐溶液的反应及相关工业计算。
本课深入探讨了溶液的形成原理、宏观特征及溶质与溶剂的判定方法，并重点解析了饱和溶液的动态平衡及其与溶解度之间的定量关系。通过学习，学生将掌握如何利用温度和溶剂变化调节溶液状态，并学会运用溶解度曲线分析物质的溶解特性。
本课程重点介绍了酸碱指示剂的变色规律、盐酸与硫酸的物理性质及安全操作，并深入探讨了浓硫酸的脱水性与稀释规范。通过学习酸的化学通性，学生能够掌握酸在工业除锈及中和反应中的应用逻辑，并提升实验室安全防护意识。
本节课深入探讨了盐的化学性质、常见盐类的用途以及复分解反应的原理。通过学习盐与盐、盐与酸碱的反应规律，学生将掌握复分解反应的发生条件，并能运用化学知识分析食品安全、农业化肥施用及地质现象等生活实际问题。
本课程探讨了人体所需的六大营养素，重点分析了蛋白质、糖类和油脂在生命活动中的供能与调节作用，并介绍了粗盐提纯的化学实验方法。通过学习，学生能够理解营养物质的化学本质、能量转化规律以及如何通过科学饮食与实验操作维护身体健康。
Course Overview
📚 Content Summary
This course covers the core content of the second semester of Grade 9 Chemistry, including the properties and uses of metallic materials, the formation and properties of solutions, the chemical reactions of acids and bases, the application of salts and chemical fertilizers, and the close relationship between chemistry and daily life. The course emphasizes experimental inquiry and the connection between theory and practice.
Explore the mysteries of substances, appreciate the charm of chemistry, and build scientific literacy.
Author: Wang Jing, Zheng Changlong
Acknowledgments: Published by People's Education Press, compiled by the Chemistry Curriculum Textbook Research and Development Center of the Curriculum Textbook Research Institute.
🎯 Learning Objectives
- Understand the physical properties of common metals, recognize the definition of alloys and their excellent properties (e.g., titanium alloys and shape memory alloys).
- Master the patterns of reactions between metals and oxygen, acids, and certain salt solutions; be able to identify displacement reactions and apply the activity series of metals to solve problems.
- Understand the principles of iron smelting (hematite, magnetite), investigate the conditions for iron corrosion, and establish awareness of conserving metal resources.
- Master the concepts of solution, solute, and solvent; understand the transformation relationship between saturated and unsaturated solutions; memorize the definitions of solid and gas solubility.
- Be proficient in interpreting solubility curves, obtain substance solubility at different temperatures from graphs, and explain factors affecting seawater salt extraction and gas dissolution.
- Master calculations of solute mass fraction (including dilution and calculations combined with chemical equations), and independently complete the experiment of preparing a sodium chloride solution with a specific mass fraction.
- Be able to use acid-base indicators (litmus, phenolphthalein) to test the acidity or basicity of a solution.
- Master the main properties, uses, and safe operation procedures (e.g., diluting concentrated sulfuric acid) of hydrochloric acid, sulfuric acid, sodium hydroxide, and calcium hydroxide.
- Understand the essence of neutralization reactions (H^+ combining with OH^- to form water) and their applications in production and daily life.
- Be able to identify common salts in daily life, accurately describe their common names, and master the main uses of sodium chloride, sodium carbonate, sodium bicarbonate, and calcium carbonate.
Lessons
Overview: This unit comprehensively introduces knowledge related to metals and metallic materials. The content covers everything from the physical properties of metals and the characteristics of alloys to the chemical properties of metals (e.g., reactions with oxygen, acids, and salt solutions), and delves into the application of the activity series of metals. Additionally, this unit covers the development, utilization, and conservation of metal resources.
Learning Outcomes:
- Understand the physical properties of common metals, recognize the definition of alloys and their excellent properties (e.g., titanium alloys and shape memory alloys).
- Master the patterns of reactions between metals and oxygen, acids, and certain salt solutions; be able to identify displacement reactions and apply the activity series of metals to solve problems.
- Understand the principles of iron smelting (hematite, magnetite), investigate the conditions for iron corrosion, and establish awareness of conserving metal resources.
Overview: This unit covers core concepts about solutions in middle school chemistry, from macroscopic phenomena of formation to microscopic molecular diffusion, and further to quantitative solubility and solute mass fraction calculations. Students will learn how to distinguish between saturated and unsaturated solutions, interpret solubility curves, and master the practical skill of accurately preparing a solution with a specific mass fraction in the laboratory.
Learning Outcomes:
- Understanding and Memorization: Master the concepts of solution, solute, and solvent; understand the transformation relationship between saturated and unsaturated solutions; memorize the definitions of solid and gas solubility.
- Analysis and Application: Be proficient in interpreting solubility curves, obtain substance solubility at different temperatures from graphs, and explain factors affecting seawater salt extraction and gas dissolution.
- Calculations and Experiments: Master calculations of solute mass fraction (including dilution and calculations combined with chemical equations), and independently complete the experiment of preparing a sodium chloride solution with a specific mass fraction.
Overview: This unit focuses on the physical properties, chemical properties, and practical uses of common acids and bases. By studying acid-base indicators, neutralization reactions, and the expression of solution acidity/basicity (pH), students will build a chemical thinking pattern linking macroscopic phenomena to microscopic essence and master the experimental skills for safely handling corrosive substances.
Learning Outcomes:
- Be able to use acid-base indicators (litmus, phenolphthalein) to test the acidity or basicity of a solution.
- Master the main properties, uses, and safe operation procedures (e.g., diluting concentrated sulfuric acid) of hydrochloric acid, sulfuric acid, sodium hydroxide, and calcium hydroxide.
- Understand the essence of neutralization reactions (H^+ combining with OH^- to form water) and their applications in production and daily life.
Overview: This unit focuses on common salts in daily life and their important uses in daily life and industrial production. By exploring double displacement reactions between acids, bases, and salts and the conditions for their occurrence, the inherent laws of chemical reactions are revealed. At the same time, the course extends to the field of agriculture, elaborating in detail on the functions and identification of chemical fertilizers.
Learning Outcomes:
- Be able to identify common salts in daily life, accurately describe their common names, and master the main uses of sodium chloride, sodium carbonate, sodium bicarbonate, and calcium carbonate.
- Understand the concept of double displacement reactions and be able to determine whether a reaction occurs based on the presence of precipitate, gas, or water in the products.
- Master the effects of nitrogen, phosphorus, and potassium fertilizers on plant growth, and be able to conduct simple identification based on appearance, solubility, and chemical reactions.
Overview: This unit focuses on the close relationship between chemical substances and human health and social development. The content covers the functions and sources of the six essential nutrients required for life activities, as well as the properties, applications, and environmental impacts of organic synthetic materials. Through learning, students will establish awareness of a balanced diet for health and evaluate the pros and cons of synthetic materials in modern life from a chemical perspective.
Learning Outcomes:
- Identify and Understand Nutrients: Be able to list important nutrients for humans and explain the significance of proteins, carbohydrates, fats, and vitamins for life activities.
- Classification of Organic Compounds: Be able to distinguish between inorganic and organic substances, and understand the difference between small organic molecules and organic polymers.
- Master the Properties of Synthetic Materials: Identify plastics, synthetic fibers, and synthetic rubber; distinguish between thermoplastics and thermosetting plastics through experimental phenomena; understand composite materials.