| Category | Format | Size |
|---|---|---|
| Cantonese Education Edition Ninth Grade Chemistry Volume 2 | pptx | 6 MB |
"Representation of Solution Concentration" Solution PPT Courseware
Description
"Representation of Solution Concentration" Solution PPT Courseware
Let your memories come back
Do you know what parts the solution is made of? What is the relationship between their qualities?
solution
solute
Solvent
Solution mass = solute mass + solvent mass
Mass of solute = mass of solution – mass of solvent
Solvent mass = Solution mass – Solute mass
1. Mass fraction of solute
1. Definition: refers to the ratio of the mass of the solute in the solution to the mass of the solution.
2. Definition:
Solute mass fraction = solute mass/solution mass × 100%
Or = solute mass / solute mass + solvent mass × 100%
discuss
There is a bottle of sodium chloride solution with a mass fraction of 5%. What does 5% mean?
The solute is ( ) parts mass
The solvent is ( ) parts by mass
The solution has a mass of ( ) parts
I'll calculate
In agricultural production, it is often necessary to use a sodium chloride solution with a mass fraction of 16% for seed selection. To prepare 150kg of this solution, what mass of sodium chloride and water are needed?
Solution: m mass = m liquid × ω
=150kg ×16%
=24kg
m agent=m liquid-m substance
=150kg-24kg
=126kg
Answer: The required mass of sodium chloride is 24kg and the mass of water is 126kg.
On-site testing
1. At 20°C, put 50g sodium chloride into 100g water and stir it thoroughly. What is the solute mass fraction of the resulting solution? It is known that the solubility of sodium chloride is 36g at 20°C. (Calculation results are accurate to 0.1%)
2. At t°C, the solubility of KNO3 is 46g. At this temperature, 25g of KNO3 crystals are added to 50g of water. After stirring, the mass fraction of the solute in the resulting solution is ( )
A 31.5% B 20%
C 25% D 46%
[Answer]A
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For more information about the PPT courseware "Representation of Solution Concentration and Dilution", please click the Solution ppt Representation of Solution Concentration ppt tag.
"Representation of Solution Concentration" Solution PPT Courseware 6:
"Representation of Solution Concentration" Solution PPT Courseware 6 Knowledge Network Preparing a solution with a certain mass fraction Simple calculation of the solute mass fraction Calculation of the solute mass fraction Calculation of the solution dilution problem Preparing a solution with a certain mass fraction The solute mass fraction and...
"Representation of Solution Concentration" Solution PPT Courseware 5:
"Representation of Solution Concentration" Solution PPT Courseware 5 New Knowledge Preview 1. Preparing a solution with a certain solute mass fraction 1. Experimental steps: (1)________; (2) weigh (measure); (3) dissolve; (4)__________. 2. Instruments required for the experiment: (1) If the solute is...
"Representation of Solution Concentration" Solution PPT Courseware 4:
"Representation of Solution Concentration" Solution PPT Courseware 4 New Knowledge Preview 1. Concentration of Solution 1. The concentration of a colored solution can be roughly expressed by the solution ____________, but it cannot be expressed for a colorless solution. 2. To quantitatively express the concentration of a solution, often...
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Update Time: 2024-07-31
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