| Category | Format | Size |
|---|---|---|
| People's Education Press Ninth Grade Chemistry Volume 2 | pptx | 6 MB |
"Solubility" Solution PPT Courseware 7
Description
"Solubility" Solution PPT Courseware 7
learning target
1. Understand the meaning of solubility of solid substances
2. Be able to draw and use solubility curves
3. Know some factors that affect gas solubility. Will use knowledge about gas solubility to explain some phenomena around us.
2. Solubility
At a certain temperature, the mass of a solid substance dissolved when it reaches saturation in 100 grams of solvent is called the solubility of this substance in this solvent.
solubility of solid matter
1. Meaning: constant temperature, 100 grams of solvent, saturated state, mass of solute.
2. Influencing factors: type of solute, type of solvent, temperature
discuss
1. The solubility of sucrose at 20°C is 203.9g.
At 20°C, 203.9g of sucrose is dissolved in 100g of water, and the solution reaches saturation.
At 20°C, up to 203.9g of sucrose can be dissolved in 100g of water.
2. The solubility of potassium nitrate at 20℃ is 31.6g. What does this sentence mean? Substitute their relationships into the following table:
solid solubility curve
1: The solubility of the same substance is different at different temperatures.
2: The intersection of the curves indicates that the two substances have the same solubility at that temperature.
3: The steeper the curve, the greater the solubility of the substance is affected by temperature.
discuss:
The solubility of solid substances is affected by temperature changes:
①The solubility of most solid substances increases with temperature, such as sodium nitrate, ammonium chloride, etc.
②The solubility of a few solid substances is not greatly affected by temperature, such as table salt.
③The solubility of very few solid substances decreases as the temperature increases, such as slaked lime.
gas solubility
What does the solubility of gases relate to?
(1) When you open the soda lid, the soda will spray out automatically. What does this say about the solubility of gases in water?
(2) After drinking soda, I often burp. What else does this show about the solubility of gases?
Summary: Factors affecting gas solubility
Gas solubility generally increases as pressure increases and decreases as pressure decreases
Gas solubility generally decreases as temperature increases and increases as temperature decreases.
Classic examples
Knowledge point 1, solubility and saturated solution
[Typical Example 1] At t°C, potassium nitrate crystals are gradually added to 10 g of water until it is saturated. During this process, the solution satisfies the changing relationship between the two variables a and b in the figure below ( )
A.a - solubility, b - solute mass
B.a - mass fraction of solute, b - mass of solute
C.a - mass of solute, b - mass of solvent
D.a - solubility, b - solvent quality
Knowledge point 2. Solubility curve
[Typical Example 2] The figure below shows the solubility curves of three substances: A, B, and C. Which of the following statements is correct ( )
A． At t1℃, the order of solubility of the three substances from large to small is A>B>C
B． At t2°C, the solubilities of substances A and B are equal.
C. Saturated solutions of three substances A, B, and C will be converted into unsaturated solutions when the temperature rises.
D. When a small amount of propylene is mixed in the saturated solution of B, propylene can be precipitated by cooling crystallization.
Class summary
1. At a certain temperature, the mass of a solid substance dissolved when it reaches saturation in 100 grams of solvent is called the solubility of this substance in this solvent.
2. The external factor that affects the solubility of solids is temperature.
3. Temperature and pressure both affect the solubility of gases
4. The change of the solubility of a substance with temperature can be expressed by the solubility curve
Keywords: solution teaching courseware, solubility teaching courseware, New People's Education Edition ninth grade chemistry PPT courseware volume 2, ninth grade chemistry slide courseware download, solution PPT courseware download, solubility PPT courseware download, .ppt format
For more information about the "Solubility of Solution" PPT courseware, please click the "Solubility of Solution ppt ppt" tab.
"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...
"Solubility" Solution PPT Courseware 8:
"Solubility" Solution PPT Courseware 8 1. Solubility of Substances Usually the ability of one substance to dissolve in another substance is called solubility. The solubility is related to the properties of the solute and the solvent: different substances have different solubilities in the same solvent; the same...
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Update Time: 2024-07-04
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