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

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"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 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.

[Attention]

(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 use units when setting unknown quantities, but the entire chemical calculation process must have units, and the final result must also have units.

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.

Class feedback

Knowledge point 1 Chemical equations and their meaning

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

2Mg＋O2 =====Ignite 2MgO

48　∶()　∶()

24g ∶　()　∶()

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

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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.

"Related Calculations in Chemical Reactions" Quantitative Research on Chemical Reactions PPT teaching courseware:

"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...

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

"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 Courseware:

"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 calculations are the study of substances and the laws of their change from a quantitative aspect. Chemical knowledge is the basis of chemical calculations. Numbers...

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Update Time: 2024-09-03

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

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