Общая характеристика оснований — урок. Химия, 8 класс. - ЯКласс
Alkalis are corrosive. If they touch skin, rinse immediately with water and then a weak solution of boric or acetic acid. Common Uses: NaOHcap N a cap O cap H (caustic soda) is used in soap making; (slaked lime) is used in construction and agriculture. Practical Resources osnovaniia-konspekt uroka po khimii 8 klass
"Hydroxide" + [Metal Name in Genitive Case] + (Valence, if variable). Example: NaOHcap N a cap O cap H — Sodium hydroxide; — Copper (II) hydroxide. 2. Classification If they touch skin, rinse immediately with water
For detailed teaching materials, you can explore the lesson summary on InfoUrok or review interactive diagrams on YaKlass . You can also find video lessons at InternetUrok . Example: NaOHcap N a cap O cap H
are complex substances consisting of a metal atom (or ammonium ion) bonded to one or more hydroxide groups ( −OHnegative cap O cap H General Formula: is a metal and is its valence.
Bases formed by alkali metals (Group IA) and alkaline earth metals (Group IIA, starting from Calcium). Examples: KOHcap K cap O cap H LiOHcap L i cap O cap H Insoluble: Most other metal hydroxides. Examples: 3. Chemical Properties Alkali (Soluble) Insoluble Bases Indicator Reaction Change color (e.g., Phenolphthalein turns pink) No color change Reaction with Acids Forms salt + water (Neutralization) Forms salt + water Thermal Decomposition Stable (except LiOHcap L i cap O cap H Decompose into Oxide + Water Reaction with Acid Oxides Forms salt + water Do not react 4. Safety and Application
Bases are primarily classified by their solubility in water: