"Several Important Salts" PPT (Lesson 3)

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"Several Important Salts" PPT (Lesson 3)

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"Several Important Salts" PPT (Lesson 3)

Part One Content: Learning Objectives:

1. Understand the types and characteristics of chemical fertilizers.

2. Remember the composition characteristics of ammonium salts and the chemical properties and testing methods of ammonium salts.

3. Understand the properties of some common salts through experiments.

Several important types of salt PPT, part 2: salt and chemical fertilizers

1.What is chemical fertilizer?

It is a fertilizer that is refined through chemical processing using minerals, air, water, etc. as raw materials.

2. Fertilizer type

① Nitrogen fertilizer: Fertilizer mainly containing nitrogen

②Potassium fertilizer: Fertilizer mainly containing potassium

③Phosphate fertilizer: Fertilizer mainly containing phosphorus element

④ Compound fertilizer: Fertilizer containing two or more elements

3. Various chemical fertilizers

①Nitrogen fertilizer:

Common nitrogen fertilizers are: urea CO(NH2)2 NH4+ (ammonium salt) NO3- (nitrate)

Its main functions are: it can promote the lush growth of stems and leaves of crops and contains important elements that make up chlorophyll.

Preparation of nitrogen fertilizer (ammonium salt): commonly used by the reaction of acid and ammonia gas

NH3+H2O+CO2 = NH4HCO3 (ammonium bicarbonate)

2NH3+H2SO4 = (NH4)2SO4(ammonium sulfate)

4. Properties of ammonium salts

⑴ What changes occur when sodium hydroxide solution is added dropwise to the concentrated ammonium sulfate solution?

⑵Put the moist red litmus paper at the mouth of the test tube. Does the color of the test paper change? What's the reason for the change?

②Phosphate fertilizer:

Common phosphate fertilizers include: superphosphate [a mixture of CaSO4 and Ca(H2PO4)]

Heavy superphosphate Ca(H2PO4)2

The main functions are: it can promote the development of crop root systems, enhance nutrient absorption and cold and drought resistance, and promote the increase of crop panicles and plump grains.

③Potassium fertilizer:

Common potash fertilizers include: plant ash (K2CO3), potassium chloride (KCl), potassium sulfate (K2SO4)

The main functions are: it can promote the vigorous growth of crops and strong stems, enhance the resistance to diseases and insect pests, and promote the production of sugar and starch.

Several important salts PPT, part 3: properties of bases and salts

[Experimental goal]

1. Use some common knowledge of bases that you have learned to guide the exploration of the chemical properties of calcium hydroxide.

2. Understand some properties of common salts through experiments.

3. Learn how to test SO42- or Cl-containing compounds.

4. Consolidate the operation of test tubes and droppers.

【experiment equipment】

Test tube, glue-tipped dropper, glass rod, porous porcelain plate, clarified lime water, litmus test solution, phenolphthalein test solution, dilute sulfuric acid, dilute hydrochloric acid, dilute nitric acid, copper sulfate solution, ferric chloride solution, sodium chloride solution, Barium chloride solution, silver nitrate solution, sodium carbonate solution, distilled water, CO2 generating device, catheter, rubber tube.

【experiment procedure】

1. Based on some common knowledge of bases that you have learned, design an experimental plan to explore the chemical properties of calcium hydroxide (represented by an operation diagram), perform the operation, and fill in the corresponding experimental report.

2. Understand some properties of salt.

(1) Take 3 test tubes and pour dilute sulfuric acid, copper sulfate solution, and sodium carbonate solution into them respectively. A small amount of barium chloride solution was added dropwise to each of these three test tubes. What was the observed phenomenon?

A white precipitate is formed

Then add a few drops of dilute nitric acid into each of the three test tubes. What is the phenomenon observed after shaking?

Only the white precipitate disappeared in the original sodium carbonate test tube

(2) Take 3 test tubes, pour dilute hydrochloric acid, sodium chloride solution, and sodium carbonate solution into each of these 3 test tubes. Add a few drops of silver nitrate solution to each of these 3 test tubes. What is the observed phenomenon?

A white precipitate is formed

Then add a few drops of dilute nitric acid into each of the three test tubes. What is the phenomenon observed after shaking?

Only the white precipitate disappeared in the original sodium carbonate test tube

Several Important Salts PPT, Part 4: Classroom Exercises

1. Among the following types of salts, except potassium salt, sodium salt, and ammonium salt, which are soluble in water, most of the other salts are insoluble in water ( )

①Phosphate ②Carbonate ③Nitrate ④Sulfate ⑤Hydrochloride

A. ①② B. ②④ C. ①③ D. ①⑤

2. Add the following groups of substances to water, which one can obtain a colorless and transparent solution ( )

A.FeCl3, KOH, NaCl

B.K2SO4, BaCl2, HCl

C.CuSO4, HCl, KCl

D.Na2CO3, KCl, Na2SO4

Keywords: Zhejiang Education Edition ninth grade science PPT courseware free download, several important salt PPT download, .PPT format;

For more information about the "Several Important Salts" PPT courseware, please click on the "Several Important Salts" ppt tag.

"Several Important Salts" PPT courseware:

"Several Important Salts" PPT courseware Part 1: What is salt? Question: Is salt table salt? Scientifically speaking, salt refers to a type of compound containing metal ions (including ammonium ions) and acid ions. Sodium chloride: NaCl = Na+ + Cl..

"Several Important Salts" PPT (second lesson):

"Several Important Salts" PPT (Second Lesson) Part One Content: Learning Objectives: 1. Learn to use the solubility tables of some acids, bases, and salts; 2. Know the metathesis reaction and understand the conditions of the metathesis reaction; 3. Understand Chemical properties of salt and preparation of salt..

"Several Important Salts" PPT (first lesson):

"Several Important Salts" PPT Part One Content: Learning Objectives: 1. Understand the difference between table salt and salt. 2. Understand the main properties and uses of the three salts NaCl, Na2CO3, and CaCO3. 3. Master the identification method of CO32-. ... ... ... Several important salt PPT...

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Update Time: 2024-08-06

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《几种重要的盐》PPT(第三课时)
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