"Relevant Calculations in Chemical Reactions" Quantitative Research on Chemical Reactions PPT Courseware

Description

"Relevant Calculations in Chemical Reactions" PPT courseware for quantitative research on chemical reactions, 17 pages in total.

new knowledge learning

Knowledge points Calculation based on chemical equations

Chemical calculation is the study of substances and the laws of their change from the aspect of "quantity". Chemical knowledge is the basis of chemical calculation, and mathematical operations are the tools of chemical calculation.

[Example] What mass of hydrogen can be produced by decomposing 18 kg of water?

[Note] (1) All quantities substituted into chemical equation calculations must be quantities of pure substances. If they are impure substances, they need to be converted. Mass of pure substance = Mass of impure substance × Purity = Mass of impure substance × (1 – Mass fraction of impurity)

(2) The volume of gas or liquid must be converted into the mass of gas or liquid.

(3) Do not write units when setting up unknowns, but the entire chemical calculation process must have units, and the final result must also have units.

Interactive exploration

Research point Calculation based on chemical equations

[Question Exploration] It is known that 1 kg of hydrogen can drive a hydrogen energy car with a power of 50 kW for about 100 kilometers. Do you know how many kilometers the hydrogen produced by the decomposition of 18 kg of water can support the car? ? What should you pay attention to when calculating?

[Induction improvement] When calculating based on chemical equations, you must first understand the principles of chemical reactions and write chemical equations correctly; secondly, you must find the relationship between known quantities and unknown quantities based on chemical equations; and then based on This relationship is solved by a proportional formula; finally, the problem-solving process and results must be checked. Chart-type calculation questions integrate data processing and chemical problems. When answering the large amount of information, you must be good at extracting information from the chart, find the "eye of the question" to solve the problem, and explore the hidden conditions to make full use of them.

Core 1: Text narrative calculation questions

Example 1 [2017·Guiyang] A factory requires 20 kg of hydrogen as raw material. If the hydrogen is produced by electrolyzing water, what is the mass of oxygen produced at the same time?

[Method Instructions] The transformation relationship between substances is presented in the form of text description. When calculating the mass of substances, you must review the meaning of the question, find out the key data, list the proportional formula, and perform calculations. Finally, don’t forget to analyze the data. test.

Core 2: Coordinate image calculation questions

Example 2 [2017·Hezhou] When 32.5 g of a solid mixture of manganese dioxide and potassium chlorate is heated to produce oxygen in the laboratory, the mass change of the remaining solid material is shown in Figure 5-3-1. Please calculate:

(1) When the reaction is complete, the mass of oxygen produced is ________g.

(2) After complete reaction, the remaining solid material is _______________ (fill in the chemical formula).

Class feedback

Knowledge points Calculation based on chemical equations

1. Calculate the mass ratio of each substance in the reaction below.

2Mg＋O2======Ignite 2MgO

48:　()　:()

24 g ∶ () ∶ ()

2.3 g of magnesium is fully burned in oxygen. Calculate the mass of magnesium oxide produced.

Keywords: Free download of Chemistry PPT courseware for the first volume of the ninth grade of the Lujiao Education Edition, download of PPT related calculations in chemical reactions, download of PPT of quantitative research on chemical reactions, .PPT format;

For more information about the "Quantitative Study of Chemical Reactions and Relevant Calculations in Chemical Reactions" PPT courseware, please click the "Quantitative Study of Chemical Reactions PPT Relevant Calculations in Chemical Reactions" PPT courseware.

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"Relevant Calculations in Chemical Reactions" PPT teaching courseware on quantitative research on chemical reactions, 22 pages in total. Learning objectives 1. Know the steps and writing formats for calculations based on chemical equations; 2. Be able to perform relevant calculations based on chemical equations; 3. Understand quantitative research on chemical...

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"Relevant Calculations in Chemical Reactions" Quantitative Study of Chemical Reactions PPT download, 18 pages in total. Learning objectives 1. Understand the basis for calculations based on chemical equations; 2. Master the steps and writing formats for calculations based on chemical equations; 3. Be able to make meaningful calculations based on chemical equations..

"Related Calculations in Chemical Reactions" Quantitative Study of Chemical Reactions PPT:

"Relevant Calculations in Chemical Reactions" Quantitative Research on Chemical Reactions PPT, 21 pages in total. New Knowledge Learning Knowledge Points Calculation based on chemical equations Chemical calculations study substances and the laws of their change from a quantitative aspect. Chemical knowledge is the basis of chemical calculations. Mathematical operations...

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Update Time: 2024-11-23

This template belongs to Chemistry courseware Lu Jiao Edition Ninth Grade Chemistry Volume 1 industry PPT template

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