"Several Common Bases" Acids and Bases PPT Courseware

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Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 2	pptx	6 MB

"Several Common Bases" Acids and Bases PPT Courseware

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Upload Time: 2024-09-06

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"Several Common Bases" Acids and Bases PPT Courseware

Review the chemical properties of acids

1. indicator

Purple litmus solution turns red

Colorless phenolphthalein solution does not change color

2. Active metal: react to generate salt and hydrogen

3. With carbonate: generate salt, water, carbon dioxide

4. With metal oxides: generate salt and water

5. With alkali: generate salt and water

Compare the following 4 chemical reactions:

NaOH + HCl = NaCl + H2O

2NaOH + H2SO4 = Na2SO4 + 2H2O

Ca(OH)2 + 2HCl = CaCl2 + 2H2O

Ca(OH)2 + H2SO4 = CaSO4 + 2H2O

Understand the corrosive nature of sodium hydroxide

1. Be very careful when using to prevent skin and clothes from being corroded.

2. Using the strong corrosiveness of sodium hydroxide, you can make homemade leaf vein bookmarks.

[Experimental exploration]

Ask the question: Does carbon dioxide react with sodium hydroxide solution?

Conjecture 1: Carbon dioxide gas reacts with sodium hydroxide solution

Conjecture 2: Carbon dioxide gas and sodium hydroxide solution do not react

Analysis: Analyze the above experiment from the perspective of particles and write a chemical reaction equation.

Extension: What will happen if sodium carbonate solution is added? Write the equation for the reaction.

summary:

Properties of bases

and indicator effect

Reacts with non-metal oxides to form salt and water

Reacts with acid to form salt and water

Reacts with certain salts to form new bases and new salts

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For more information about the PPT courseware "Acides and Bases: Several Common Bases", please click on the Acids and Bases ppt: Several Common Bases ppt tag.

"Several Common Bases" Acids and Bases PPT Courseware 4:

"Several Common Bases" Acids and Bases PPT Courseware 4 Knowledge Review Knowledge Point 1 Physical properties of sodium hydroxide and calcium hydroxide Sodium hydroxide: white solid, ____ dissolves in water and releases a lot of heat. Easily absorbs moisture and is highly corrosive. Calcium hydroxide: white...

"Several Common Bases" Acids and Bases PPT Courseware 3:

"Several Common Bases" Acids and Bases PPT Courseware 3 Chemical Properties of Acids ① Acids and acid-base indicators ② Acid + metal = salt + H2 ③ Acid + metal oxide = salt + H2O ④ Acid + alkali ⑤ Acid + carbon Acid = salt + H2O + CO2 The alkali preserved egg, soap liquid and other detergents in daily life include...

"Several Common Bases" Acids and Bases PPT Courseware 2:

"Several Common Bases" Acids and Bases PPT Courseware 2 Review before class: Acid: A compound in which all cations produced during ionization are hydrogen ions (H+). Such as HCl, H2SO4, HNO3, H2CO3 Alkali: All the anions produced during ionization are compounds of hydroxide ions (OH-). ..

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"Several Common Bases" Acids and Bases PPT Courseware