"Chemical Fertilizer" Salt Fertilizer PPT Courseware (Lesson 2)

Description

"Chemical Fertilizer" Salt Fertilizer PPT Courseware (Lesson 2), 13 pages in total.

Classification practice of knowledge points

1. Among the following chemical fertilizers, the one that can be distinguished from other chemical fertilizers by its smell is ()

A.Ammonium bicarbonate B.Ammonium nitrate

C.Potassium sulfate D.Potassium chloride

2. Among the following four chemical fertilizer samples, add hydrated lime and mix them respectively. Which one can smell a pungent smell after grinding ()

A. Potassium sulfate B. Phosphate rock powder

C.Ammonium chloride D.Potassium nitrate

3. Nitrogen fertilizer, phosphate fertilizer, and potassium fertilizer are the most important chemical fertilizers in agricultural production. It is practical to distinguish the three types of chemical fertilizers in a simple way in agricultural production. What is the possible way to distinguish the following related chemical fertilizers ()

A.NH4Cl and KCl: observe the appearance

B.NH4HCO3 and KCl: add water

C.K2SO4 and Ca3(PO4)2: smell

D. (NH4)2SO4 and K2SO4: add slaked lime and grind them to smell.

Comprehensive training with regular methods

6. A student identified three chemical fertilizers: NH4HCO3, NH4Cl, and KCl. The process is shown in Figure 11-2-1. Reagents A and B may be ()

A.A: water, B: sodium hydroxide

B. A: hydrated lime, B: dilute hydrochloric acid

C. A: dilute hydrochloric acid, B: sodium chloride solution

D. A: sodium hydroxide, B: sodium sulfate solution

7.2017·Liupanshui A chemistry interest group conducted research activities to identify chemical fertilizers. They conducted the following research on four types of chemical fertilizers: ammonium chloride, ammonium bicarbonate, potassium sulfate, and phosphate rock powder:

(1) Take a small amount of each of the above four chemical fertilizers and put them into test tubes for observation. From the appearance, you can distinguish ________ from other chemical fertilizers.

(2) Add a small amount of dilute hydrochloric acid to a test tube containing three other chemical fertilizers. The gas produced is __________________.

(3) If you want to continue to distinguish the other two types of chemical fertilizers, the material chosen is ________, phenomenon and conclusion: _________________________________________.

Practical practice of high-frequency test questions

8.2018·Guangzhou Which of the following statements about chemical fertilizers is incorrect ()

A. Chemical fertilizers play an important role in increasing crop yields

B. Potassium chloride (KCl) and diammonium hydrogen phosphate[(NH4)2HPO4] are both compound fertilizers

C. Ammonium nitrogen fertilizer has a pungent smell after being mixed and ground with slaked lime

D. Excessive use of chemical fertilizers will cause soil acidification, which can be improved with hydrated lime.

9.2018·Weifang In agriculture, ammonium bicarbonate can be used as ______ fertilizer, but it cannot be mixed with alkaline substances because of ____________________________.

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For more information about the "Salt Fertilizer and Chemical Fertilizer" PPT courseware, please click on the Salt Fertilizer PPT Chemical Fertilizer PPT tab.

"Chemical Fertilizer" Salt Fertilizer PPT Courseware (Lesson 1):

"Chemical Fertilizer" Salt Fertilizer PPT Courseware (Lesson 1), 12 pages in total. Classification of knowledge points Knowledge point 1 Chemical fertilizers 1. Scientific application of chemical fertilizers is an important means to increase agricultural production. The following are nitrogen fertilizers: ( ) A.K2CO3 B.Ca(H2PO4)2 C.NH4HCO3 D..

"Chemical Fertilizer" Salt Fertilizer PPT Teaching Courseware:

"Chemical Fertilizer" Salt Fertilizer PPT teaching courseware, 41 pages in total. New Knowledge Learning Knowledge Point 1 Introduction to Chemical Fertilizers [Tips] (1) Compound fertilizers: refers to chemical fertilizers that contain ____________________ of the three nutrients nitrogen, phosphorus, and potassium at the same time. Such as KNO3, NH4H2PO4, etc. ..

"Chemical Fertilizer" Salt PPT Courseware 3:

"Chemical Fertilizer" Salt PPT Courseware 3 Knowledge Review Knowledge Point 1 Definition and Types of Chemical Fertilizers 1. Definition of chemical fertilizers: _______________________________. 2. Fertilizers are divided into two categories: ___________ and ___________. 3. The most important chemical fertilizer_..

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Update Time: 2024-11-15

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 2 industry PPT template

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