"Diversity of Iron" Properties and Transformation of Matter PPT (Transformation between Iron and Its Compounds in Lesson 2)

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"Diversity of Iron" Properties and Transformation of Matter PPT (Transformation between Iron and Its Compounds in Lesson 2)

Part One: What are the new curriculum standards?

1. Understand the properties of iron and its compounds through the change of valence state of iron element.

2. Understand the mutual conversion methods of Fe, Fe2+ and Fe3+.

Diversity of iron PPT, part 2: exploration of new knowledge

Conversions between iron and its compounds

[New textbook for self-study]

Read the textbook and answer the following questions:

1. Iron and its common compounds mainly include: Fe, FeO, Fe2O3, Fe3O4, FeCl2, FeCl3, Fe(OH)2, Fe(OH)3, etc. Please mark them in the appropriate position in the picture to complete the description of iron and its compounds. The two-dimensional "price-category" diagram uses arrows to indicate the transformation relationship between them and explains the basis.

2. The following are some instructions for use of a certain brand of iron supplement oral liquid:

[Main raw materials]Ferrous lactate, vitamin C

[Ingredients List]Purified water, vitamin C, ferrous lactate, food additives[Aspartamecontains phenylalanine, L malic acid, apple flavor]

[Functional ingredients and content]Each 100 mL contains: ferrous lactatecalculated as iron20～30 mg, vitamin C 200～300 mg

[Health function]Improving nutritional anemia

[Shelf life]24 months

[Storage Method]Seal in a cool and dark place

(1) Perform the experiment as shown in the figure.

Observed phenomenon: adding KSCN solution, ________; after adding chlorine water, _______________. Explain that the valence state of Fe element in oral liquid is ________, and use the ionic equation to explain the reason: _______________________.

(2) Can NaOH solution be used to test the valence state of Fe element in iron supplements? Why?

(3) According to the instructions for use, the oral liquid ingredients contain a certain amount of vitamin C. What is the reason?

(4) What is the reason why oral liquids are required to be stored in a "sealed, dark and cool place"?

[Implement new knowledge]

1. Transformation relationship between iron and its compounds

2. Inspection of Fe3+ and Fe2+

(1)Alkali adding method

(2) Color development method

(3) Precautions

①Fe3+ is brown and Fe2+ is light green, but they are generally not used for ion testing.

②The "solution" after the interaction between Fe3+ and SCN- appears red, but it is not a precipitation.

③When checking whether Fe2+ exists in a solution containing Fe3+, NaOH solution cannot be used. Acidic KMnO4 solution can be added. If the acidic KMnO4 solution fades, the solution contains Fe2+; if the acidic KMnO4 solution does not fade, the solution does not contain Fe2+.

[Practice the new exam]

1. The ions that can be tested with KSCN solution are ()

A． Na+B． Ag＋

C. Fe2＋D． Fe3+

2. The following substances can convert Fe3+ into Fe2+ ()

① Newly produced chlorine water ② Iron ③ Copper ④ Dilute sulfuric acid

A． ①②③ B． ③④

C. ②③ D. ①②③④

3. After dissolving iron filings in excess dilute hydrochloric acid, and then adding the following substances, Fe3+ will be generated ()

A． Sulfuric acid b. Chlorine water

C. Zinc sulfate D． copper chloride

4. A FeCl2 solution that has been left for a long time turns yellow, and a student thinks that some Fe2+ may be oxidized to Fe3+; the method to verify whether Fe3+ exists in the solution is ________;

If you want to verify that there is still a large amount of Fe2+ in this solution, the method is_______________________________________________.

Analysis: If Fe3+ is present, the KSCN solution will appear red when added; to prove the presence of Fe2+, the interference of Fe3+ must be eliminated, and the reducing property of Fe2+ can be used.

Answer: Take a small amount of solution in a test tube, and dropwise add KSCN solution. If the solution turns red, then there is Fe3+ in the solution. Take a small amount of solution in a test tube, and dropwise add KMnO4 solution. If the solution fades, then there is Fe2+ in the solution.

Mutual transformation and application of Fe, Fe2+ and Fe3+

[More difficult]

[Typical example] An acidic industrial waste liquid contains FeCl2, CuCl2 and FeCl3. In order to recover copper and obtain pure FeCl3 solution, the figure is the main process of comprehensive utilization:

(1) The names of substances A and F: A___________; F___________.

(2) The name of the ①② operation is _________, and the glass instruments required to perform this operation in the laboratory are __________________.

(3) Write the ionic equation related to step ① and the chemical equation of step ③ based on the diagram.

①_________________________, ____________________, _______________________________.

③____________________________________________.

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For more information about the PPT courseware "Properties of Substances and Diversity of Transformations of Iron and Transformations between Iron and Its Compounds", please click on the ppt tag of "Properties of Substances and Diversity of Transformations of Iron ppt Diversity of Transformations of Iron and Transformations of Iron and Its Compounds".

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Update Time: 2024-09-25

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