"Transformation of Matter" PPT (Lesson 4)

Description

"Transformation of Matter" PPT (Lesson 4)

Part One Content: Learning Objectives:

1. Ability to identify substances based on their characteristic reactions

[Experimental goal]

1. Learn more about the chemical properties and relationships of acids, bases, salts, and oxides.

2. Can identify substances based on their characteristic reactions.

3. Further experience the methods used by scientists to study the properties of matter through experiments.

【experiment equipment】

Barium chloride solution, silver nitrate solution, dilute nitric acid, sodium carbonate solution,

Purple litmus test solution, phenolphthalein test solution, distilled water, 6 test tubes.

【experimental method】

(1) Physical methods

Difference analysis based on the physical properties of substances (color, smell, state, solubility, whether it releases heat when dissolved in water, etc.).

(2) Chemical methods

Based on the difference analysis of the chemical properties of substances, that is, based on the analysis of different phenomena or products produced during chemical reactions, various known substances can be distinguished one by one.

【Experimental steps】

Generally: sampling → operation → phenomenon → conclusion

1. Take a small amount of samples separately

2. Drop test reagents

3. Observe and record the phenomena of the experiment

4. Analyze and draw conclusions

How to operate

Physical methods: Observe color, smell odor, solubility, evaporation.

Chemical methods: thermal decomposition method, pH value measurement method, indicator method, ignition method, adding chemical reagent method, method without any other reagent (mutual reaction).

Transformation of Matter PPT, Part 2: Classroom Exercises

1. There are four bottles of solutions that have lost their labels: ① MgCl2 ② KCl ③ NaOH ④ CuSO4 . Use the simplest method to identify them one by one without using any other reagents. Then the most reasonable order among the following identifications is---- ( )

A. ④③①② B. ④①③②

C. ①③④② D. ③④①②

2. There are four solutions: hydrochloric acid, copper sulfate, magnesium chloride, and colorless phenolphthalein. If only one reagent can be used to distinguish them, the optional reagent is----()

(A) AgNO3 (B) BaCl2

(C) NaOH (D) Dilute H2SO4

3. Which of the following experimental methods is wrong---( )

A． Use dilute nitric acid to remove Na2CO3 mixed in NaCl

B. Use wooden sticks with sparks to distinguish air and oxygen

C. Distinguish between NH4NO3 and NaOH using water

D. Use moist litmus paper to differentiate between CO and CO2

4. If only phenolphthalein test solution is used in the laboratory and based on the interaction between substances of the same group, what can be identified ---- ( )

A． NaOH, Ba(OH)2, HCl

B. NaOH, HCl, NaCl

C. H2SO4, Na2SO4, NaCl

D. NaOH, NaNO3, NaCl

Keywords: Zhejiang Education Edition ninth grade science PPT courseware free download, transformation of matter PPT download, .PPT format;

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Update Time: 2024-09-18

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 1 industry PPT template

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