"Formation of Solution" Solution PPT Courseware (Lesson 2)

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"Formation of Solution" Solution PPT Courseware (Lesson 2), 20 pages in total.

new knowledge learning

Knowledge point 1: Judgment between saturated solution and unsaturated solution

1. Observe whether potassium nitrate can dissolve infinitely in a certain amount of water

(1) In a beaker containing 20 mL of water, add 5 g of potassium nitrate and stir thoroughly until all the potassium nitrate is dissolved.

(2) Add 5 g of potassium nitrate to the solution obtained above and stir thoroughly until the potassium nitrate is partially dissolved.

2. Saturated solution and unsaturated solution

Under a certain ______, a solution in which ______ continues to dissolve potassium nitrate is called a saturated solution of potassium nitrate, and a solution in which ______ continues to dissolve potassium nitrate is called an unsaturated solution of potassium nitrate.

Interactive exploration

Research point 1 Saturated solution and unsaturated solution

[Scenario display]

[Question Research] If potassium nitrate is added to a glass of water, can it be dissolved indefinitely?

[Inductive improvement] Potassium nitrate cannot be dissolved indefinitely in a certain amount of water. We call a solution that can no longer dissolve a certain solute at a certain temperature a saturated solution of that solute, and a solution that can continue to dissolve a certain solute is called an unsaturated solution of that solute. But there is no necessary connection between whether the solution is saturated and the concentration of the solution.

[Core Applications]

Core 1 Saturated solution and unsaturated solution

Example 1: Among the following statements, the correct one is ()

A. A saturated solution of the same solute must contain more solute than its unsaturated solution of the same mass.

B． At a certain temperature, a saturated solution of substance M cannot dissolve any more substances

C． At a certain moment, there are some sodium chloride crystals in a beaker containing a sodium chloride solution, then the solution must be a saturated solution of sodium chloride at that temperature

D． At a certain moment, the solution of a certain substance is either a dilute solution or a saturated solution.

Class feedback

Knowledge point 1: Saturated solution and unsaturated solution

1. The saturated solution of a certain substance must be ()

A. Concentrated solution

B. Dilute solution

C. Solution containing 100 g water

D. A solution that can no longer dissolve the substance

2. A cup of sodium nitrate solution at 20 ℃, which of the following methods can prove that it is a saturated solution ()

A. When 10 g of water evaporates, crystals precipitate

B． Add 10 g sodium nitrate crystals, some crystals are not dissolved

C． When the temperature drops to 10°C, crystals will precipitate.

D． At this temperature, adding a small amount of sodium nitrate crystals will no longer reduce the quality of the crystals

Keywords: Free download of Chemistry PPT courseware for the first volume of the ninth grade of the Lujiao Education Edition, PPT download of the formation of solution, PPT download of solution, .PPT format;

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Update Time: 2024-11-19

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

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