Note: The substance CrMdO3 does not exist in chemistry. The following is an example of how to introduce a substance in chemistry to students, specifically water (H2O).
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Definition of H2O
1.1 Names
1.1.1 Common name: Water
1.1.2 English name: Water
1.2 Atomic composition: H2O consists of 2 Hydrogen atoms (H) and 1 Oxygen atom (O).
1.3 Atomic mass: Average about 18.015 daltons
1.3.1 Molecular structure: 1 H2O molecule consists of 2 Hydrogen atoms and 1 Oxygen atom
1.4 Ion structure: When water becomes ionized, it can produce Hydroxide ions (OH-) and Hydronium ions (H3O+). -
Properties of H2O
2.1 Physical properties of H2O
State: Liquid at room temperature
Color: Colorless
Odor: Odorless
PH value: Approximately 7 (meaning water is a neutral substance)
2.2 Chemical properties of H2O: Water can react with many other substances, including metals, acids, and bases. -
Common chemical equations of H2O
Water participates in many different chemical processes, including oxidation and reduction, hydrolysis, and many other transformations. -
Preparation of H2O
4.1 Laboratory preparation of H2O: Water can be prepared through the reaction process between Hydrogen and Oxygen under appropriate temperature and pressure conditions. H2 + O2 -> H2O
4.2 Industrial preparation of H2O: In industry, water is usually collected from natural sources such as springs, lakes, rivers, or wells.