"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT Courseware 2

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"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT Courseware 2

Experiments are needed to verify. Use data to illustrate.

Different substances have different dissolving abilities in water. So how big is the dissolving ability of a substance in water?

Can you provide exact data on its dissolving capacity?

How can we study the amount of salt dissolved in a glass of water and know the amount of its dissolving power? Ask students to refer to some student dialogue prompts in the text and combine them with the experience of the previous class to come up with experimental methods.

think:

What small problems should we focus on solving?

How to prepare 100ml of water?

How to add salt?

Experimental conditions:

(1), a cup of water (100 ml), 40 grams of salt (30 ml)

(2) Add the same amount of salt (1 part) each time, a total of 10 parts

(4) Wait until the first portion is dissolved before adding the second portion until the added salt can no longer be dissolved.

(5) Calculate how many parts are dissolved until the salt cannot be dissolved, and how many grams it is.

Based on these determined quantities, students compared the research plan in the text to formulate the research plan of their group.

One conclusion can be drawn from today’s experiment——

A certain amount of water can only dissolve a certain amount of salt

The salt water everyone makes now can no longer dissolve table salt. Such a solution is called a saturated solution.

Operation

1. In an environment of 20 degrees Celsius, 100 ml of water dissolves approximately ( ) grams of salt.

2. In the experiment of how many grams of table salt can be dissolved in 100 ml of water, first divide the salt into 2 grams each, and then add ( ) into the water until ( ).

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"How many grams of salt can be dissolved in 100 ml of water" dissolving PPT:

"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT Part 1 Content: How many grams of salt can be dissolved in 100 ml of water 1. Experimental plan to study how many grams of salt can be dissolved in 100 ml of water Determine the question to be discussed: To study how much can be dissolved in a glass of water grams of table salt, must...

"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT courseware 4:

"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT courseware 4 Group discussion 1. How to conduct an experiment to study this problem? What should we pay attention to? 2. Is the same amount of salt dissolved in cups of different sizes? 3. When should the second spoonful of salt be added? No..

"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT Courseware 3:

"How many grams of salt can be dissolved in 100 ml of water" Dissolution PPT courseware 3 Observation and thinking 1. Add 1 teaspoon of salt to the beaker containing water, stir, what do you see? 2. If you add 1 teaspoon of salt and stir, will it still dissolve? 3. What will happen if you keep adding salt to this glass of water and stirring it...

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Update Time: 2024-09-30

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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