"Reaction of Acid and Base" Common Acids, Bases and Salts PPT Courseware 2

Description

"Reaction of Acid and Base" Common Acids, Bases and Salts PPT Courseware 2

learning target

1. Master the definition of neutralization reaction and understand the nature of neutralization reaction between acids and bases;

2. Master the concept of metathesis reaction and be able to judge whether a reaction is a metathesis reaction;

3. Understand the application of neutralization reactions in real life.

1. Neutralization reaction

Hydrated lime is commonly used in agriculture and industry to improve acidic soil and treat acidic wastewater. Do you know the principle?

Experimental Activity 1: Neutralization Reaction of Acids and Bases

Reaction of sodium hydroxide and dilute hydrochloric acid

Phenomenon: When phenolphthalein is added dropwise to sodium hydroxide solution, the solution appears red. As hydrochloric acid is added dropwise, the color gradually disappears to colorless.

HCl+NaOH == NaCl+H2O

Acid + Base - Salt + Water

The reaction in which an acid reacts with a base to form salt and water is called a neutralization reaction.

The essence of neutralization reaction: H+ + OH-- == H2O

2. Application of neutralization reaction

1. Improve acidic or alkaline soil

Sprinkle lime into the fish pond to neutralize excess organic acids in the bottom mud of the fish pond, so that the fish pond water reaches a pH suitable for the growth of fry.

Hydrated lime is used to neutralize excess acidity in soil and some water sources to reduce the damage of acid rain.

2.Wastewater treatment

Acidic wastewater must be neutralized with alkaline substances before it can be discharged, otherwise it will cause water pollution.

3. Medical applications

The formic acid "injected" when neutralizing mosquito bites can be used with soapy water, baking soda water, dilute ammonia or cooling oil.

Classic examples

Knowledge point 1: Neutralization reaction

1. When doing experiments on acid and alkali neutralization reactions, it is sometimes necessary to use the color change of the indicator to determine whether the reaction has occurred and completed. Into the beaker containing the NaOH solution of phenolphthalein, dilute hydrochloric acid was continuously added dropwise. The color change of the solution in the beaker during this process is ( )

A． From red to blue B. from blue to red

C. From red to colorless D. From colorless to red

Knowledge point 2: Application of neutralization reaction

1. When eating preserved eggs, you often feel astringent. This is because raw materials such as hydrated lime and soda ash are used in the process of making preserved eggs. In order to reduce the astringency, you can add some kind of condiment when eating preserved eggs. The best condiment is ( )

A. Salt B. Vinegar

C. Sesame oil D. MSG

Knowledge training

1. Among the following practical applications, the principle of neutralization reaction is used ( )

① Use sodium hydroxide solution to wash away residual sulfuric acid in petroleum products;

②Use dilute sulfuric acid to remove rust;

③Use hydrated lime to improve acidic soil;

④ Treat hyperacidity with sodium bicarbonate

A． ①③ B. ③④ C. ①②④ D. ①③④

2. After the following chemical reactions occur, soak the used instruments in dilute hydrochloric acid, and then rinse them with water. The instruments that cannot be cleaned are ( )

A． Reagent bottle holding lime water

B． Hard glass tube after reducing iron oxide with carbon monoxide

C. After reducing copper oxide with hydrogen, leave the test tube open for a period of time with a red solid residue attached.

D． A beaker containing a reddish-brown solid after containing rusty iron nails

3.X can undergo the following reactions: ①X+acid→salt+water; ②X+non-metal oxide→salt+water. X may be ( )

A． Copper oxide b. hydrochloric acid

C. Sodium hydroxide D. Sodium carbonate

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For more information about the PPT courseware "Common Acids and Bases Reactions of Hydrochloric Acid and Alkali", please click on the Common Acids and Bases ppt Reactions of Acids and Bases ppt tag.

"Reaction of Acid and Base" Common Acids, Bases and Salts PPT Courseware 3:

"Reactions of Acids and Bases" Common Acids, Bases, and Salts PPT Courseware 3 Knowledge Review Knowledge Point 1 Neutralization Reaction Experiment Activity 1: Neutralization Reaction of Acids and Bases Experimental Phenomenon of the Reaction of Sodium Hydroxide and Dilute Hydrochloric Acid: In Hydrogen Oxidation After adding phenolphthalein dropwise to the sodium solution, the solution showed ______,...

"Reaction of Acid and Base" Common PPT courseware of acids, bases and salts:

"Reaction of Acids and Bases" Common PPT Courseware of Acids, Bases and Salts New Knowledge Preview 1. Reasons why acids and bases have similar chemical properties 1. Acid: After being dissolved in water, the cations produced are all ________, so they will show common chemical properties in the aqueous solution..

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Update Time: 2024-09-09

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 2 industry PPT template

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