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Authoritative PPT Summary
"Fast and Slow Dissolution" Dissolution PPT Courseware 4
【teaching objectives】
Scientific concept: Understand that the speed at which soluble solid substances dissolve in water is related to factors such as the size of the object particles (ie, the size of the surface area), the temperature of the water, and whether the mixed solution is stirred.
Process and methods: Guide students to go through the process of scientific inquiry of “problem-hypothesis-verification-confirmation” and the process of controlling a single variable to conduct comparative experiments.
Emotional attitudes and values: Willing to apply the scientific method of comparative experiments to the research of solving similar scientific problems, and develop the awareness of fair experiments. Experience the fun of studying the factors that affect the speed of dissolution.
What are the characteristics of substances dissolved in water?
1. The substance is evenly and stably dispersed in water
2. Will not settle on its own
3. Separation without filtration
Research on accelerating the dissolution of fruit sugar
What methods can be used to speed up dissolution?
How to choose experimental materials?
How much water was used for the experiment?
How to compare whether fruit sugar dissolves quickly or slowly?
How to time it? How to conduct experiments and record them?
How to interpret the experimental results?
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For more information about the PPT courseware "Dissolving Fast and Slowly", please click the "Dissolving ppt Dissolving Fast and Slowly" ppt tab.
"Dissolution Fast and Slow" Dissolution PPT Download:
"Fast and Slow Dissolution" Dissolution PPT download Part 1: Which one dissolves faster 1. To explore whether stirring can speed up the dissolution of salt. Experimental purpose: to test whether stirring can speed up dissolution. Experimental materials: 2 beakers, 20 grams of salt, 1 stirring rod. Experimental steps: ..
"Dissolution Fast and Slow" Dissolution PPT:
"Fast and Slow Dissolution" Dissolution PPT Part 1: Which one dissolves faster? How to make a cup of sugar water quickly? In production and life, it is often necessary to speed up or slow down the dissolution of a certain substance. So, what factors are related to the speed or slowness of dissolution? How to design...
"Fast and Slow Dissolution" Dissolution PPT Courseware 5:
"Fast and Slow Dissolution" Dissolution PPT Courseware 5 What are the characteristics of substances after they are dissolved in water? 1. The substance is evenly and stably dispersed in the water. 2. It will not settle by itself. 3. It cannot be separated by filtration. Which one dissolves faster? The purpose of the experiment is to test whether stirring can speed up dissolution...