"How substances dissolve in water" Dissolution PPT courseware

Description

"How substances dissolve in water" Dissolution PPT courseware

Chemical name: Potassium permanganate

Dark purple slender rhombic columnar crystals with blue metallic luster.

Easily soluble in water, aqueous solution is unstable. It decomposes when exposed to light, producing gray-black manganese dioxide that precipitates and adheres to the utensils.

Can be used as a disinfectant and bleach.

Can cause respiratory damage if inhaled. If it splashes into the eyes, it will irritate the conjunctiva and cause burns in severe cases. Irritation to skin. Concentrated solutions or crystals are corrosive to the skin and irritating to tissues, easily contaminating the skin and causing it to turn black. Therefore, direct contact with hands is not allowed.

Dissolution of potassium permanganate

Experimental equipment: beaker, water, glass rod, potassium permanganate, small spoon

Experimental operation:

In a beaker filled with water, first add 150 ml of water, then gently add a few small grains of potassium permanganate, wait and see the dispersion of potassium permanganate in the water, then gently stir the water with chopsticks, and continue to observe Changes in water and potassium permanganate.

2. Dissolution of different substances in water

In order to observe the state of different substances in water more clearly, we chose flour, sand, salt and potassium permanganate for further observation. Compare the similarities and differences between them in the water, and fill in the observation results in recording sheet 2 with a pencil.

From this, we can conclude:

Dissolution means that substances are evenly and stably dispersed in water without settling on their own, and the substances in the solution cannot be separated by filtration.

Expand and extend:

In our daily life, have you seen any other substances that can be dissolved in water? Write it down in your notebook.

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For more information about the PPT courseware "How Dissolved Substances Dissolve in Water", please click on the ppt tag of "How Dissolved Substances Dissolve in Water" ppt.

"How substances dissolve in water" Dissolution PPT:

"How Substances Dissolve in Water" Dissolution PPT Part One: Dissolution of Potassium Permanganate 1. Understand Potassium Permanganate Appearance: Dark purple slender rhombic columnar crystals with a blue metallic luster. Properties: Easily soluble in water, unstable in aqueous solution. Contact with skin can...

"How substances dissolve in water" Dissolution PPT courseware 4:

"How Substances Dissolve in Water" Dissolution PPT Courseware 4 Salt dissolved in water! How does table salt dissolve in water? Want to see the dissolution process of substances with your own eyes? I found a friend for everyone who can fulfill everyone's wishes. Its name is potassium permanganate..

"How substances dissolve in water" Dissolution PPT courseware 3:

"How Substances Dissolve in Water" Dissolution PPT Courseware 3 Learning Objectives 1. Observe and describe the dissolution process of potassium permanganate in water, and imagine the dissolution process of salt to understand how substances dissolve in water. (Key points, difficulties) 2. Recognize careful observation...

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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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