"Solubility" Solution PPT Courseware (Lesson 1)

Description

"Solubility" solution PPT courseware (Lesson 1), 21 pages in total.

New course introduction

Table salt is a condiment we are familiar with. Can it be dissolved in a certain amount of water without limit?

New lesson explanation

1. Saturated solution

Experimental investigation: At room temperature, add sodium chloride to a beaker containing 20mL of water and observe the phenomenon.

Experimental investigation: dissolution of potassium nitrate in water

At room temperature, add 5 g of potassium nitrate to a beaker containing 20 mL of water and stir; after it is dissolved, add 5 g of potassium nitrate, stir, and observe the phenomenon. When there is residual potassium nitrate solid in the beaker and it no longer dissolves, heat the beaker for a period of time and observe what happens to the remaining solid? Then add 5 g of potassium nitrate, stir, and observe the phenomenon. What happens after the solution cools?

The group explores: the dissolution of potassium nitrate in water, observing and recording the phenomenon.

1. Saturated solution

At a certain temperature, a solution in which a certain solute can no longer be dissolved in a certain amount of solvent is called a saturated solution of the solute.

A solution that can continue to dissolve a certain solute is called an unsaturated solution of that solute.

2. How to determine whether a solution is saturated

Generally speaking:

A small amount of the original solute can be added to the original solution. If the dissolved amount no longer increases, it means that the original solution is a saturated solution;

If the dissolved amount can still increase, it means that the original solution is an unsaturated solution.

3. Mutual conversion of saturated solution and unsaturated solution

Note: Saturated lime water can turn into unsaturated lime water by lowering its temperature; unsaturated lime water can turn into saturated lime water by raising its temperature.

Class summary

1. saturated solution

At a certain temperature, a certain solute is added to a certain amount of solvent, and the solution is obtained when the solute cannot continue to dissolve.

2. unsaturated solution

At a certain temperature, a certain solute is added to a certain amount of solvent, and the solution obtained when the solute can continue to dissolve.

Class exercises

1. Which of the following statements about solutions is correct ( )

A. A saturated solution is a solution that cannot dissolve any solute

B. Adding sodium chloride to a saturated solution of potassium nitrate can continue to dissolve and the density of the solution increases.

C. After taking out a part of the saturated solution, the density decreases and becomes an unsaturated solution.

D. A solution without crystals at the bottom must be an unsaturated solution

2. After adding a certain amount of water to a saturated solution of sodium chloride at 20°C, which of the following statements is correct ( )

A. The mass of the solution remains unchanged B. Still a saturated solution

C. Became an unsaturated solution D. Solvent mass remains unchanged

Keywords: Free download of PPT courseware for the second volume of the ninth grade chemistry of the People's Education Press, solubility PPT download, solution PPT download, .PPT format;

For more information about the "Solubility of Solution" PPT courseware, please click the Solution PPT Solubility PPT tab.

"Solubility" solution PPT courseware (Lesson 2):

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"Solubility" Solution PPT Courseware 10:

"Solubility" Solution PPT Courseware 10 Knowledge Review Knowledge Point 1 Saturated solution and unsaturated solution 1. Concept: At a certain temperature, in a certain amount of solvent, a solution of _________ is called a saturated solution of this solute; ___________..

"Solubility" Solution PPT Courseware 9:

"Solubility" Solution PPT Courseware 9 1. Solubility The ability of one substance to dissolve in another substance. Influencing factors: 1. Related to the properties of the solute 2. Related to the temperature 3. Related to the properties of the solution 2. Saturated solution and unsaturated solution 1. Definition 2. Mutual conversion...

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Update Time: 2024-10-08

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 2 industry PPT template

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