"Quantitative Expression of Solution Composition" Solution PPT Courseware Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Quantitative Expression... | 16775次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Quantitative Expression of Solution Composition" Solution PPT Courseware is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Quantitative Expression of Solution Composition" Solution PPT Courseware, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Quantitative Expression of Solution Composition" Solution PPT Courseware
Key points review
1. The characteristics of the solution are ( )
A Transparent B Colorless C Stratified D Uniform and stable
2. The density measured at the upper part of a cup of NaCl solution is 5 g/cm3, then the density measured at the lower part is ( )
A <5 B >5 C equal to 5 D less than 5 or greater than 5
3. What can be used as a solute ( )
A Solid B Liquid C Gas D Solid, liquid or gas can be used
Mass of solution =___________+___________
1. Completely dissolve 10 grams of potassium nitrate in 90 grams of water to form a ( ) gram solution
2. If the mass of water in 100 grams of potassium chloride solution is 89 grams, then the mass of potassium chloride ( ) grams
3. Dissolve 25 grams of sodium sulfate in ( ) grams of water to form 200 grams of sodium sulfate solution.
New knowledge guide
1.3 g of table salt is dissolved in 20 g of water. What is the mass of salt water formed?
Tip: 3 g+20 g=23 g
2. Put 5 g of white sugar in 15 g of water, and put 10 g of white sugar in 40 g of water. Which sugar water is sweeter?
hint:
The sugar content in the first sugar water is:
The sugar content in the second type of sugar water is:
So the first sugar water is sweeter.
Mass fraction of solute:
Concept: Ratio of solute mass to solution mass
Formula: Mass fraction of solute
mass of solute
= ————— × 100�
quality of solution
mass of solute
＝————————×100�
Mass of solute + mass of solvent
Meaning: How many parts of mass of solute are there in 100 parts of mass of solution.
Continue to explore
Dilute 50g of 20% potassium nitrate solution with water to a solution with a mass fraction of 10%. Find the mass of water used in dilution.
Essence: The mass of the solute remains unchanged before and after dilution
Mass of solute before dilution = Mass of solute after dilution
50 g × 20% = (50 g + x) × 10%
Solution: Let the mass of water added during dilution be x
50 g × 20% = (50 g +x) × 10%
x=50 g
Answer: The mass of water used for dilution is 50 g.
Note: When two solutions are mixed, the masses can be added, but the volumes cannot be added.
2. Preparation of solution
Prepare 50 grams of sodium chloride solution with a mass fraction of 16%.
Now that you want to prepare this sodium chloride solution, please think about how to do it? Please summarize the experimental steps and corresponding experimental instruments.
Instruments: tray balance, medicine spoon, measuring cylinder, rubber dropper, beaker, glass rod
step:
(1) Calculation: Calculate the required amount of solute and solvent according to the preparation requirements
(Calculate mass for solids and volume for liquids)
(2) Weighing: Use a tray balance to weigh out the required solute, and then use a measuring cylinder to get the required solvent.
(3) Dissolution: Mix the solute and the solvent and stir until the solute is completely dissolved.
(4) Bottle storage and label: Put the prepared solution into the reagent bottle and label it.
Prepare 50g of 16% sodium chloride solution
Step 1: Calculate the mass of sodium chloride and volume of water required.
The mass of sodium chloride required: 50g×16%=8g
The quality of distilled water required: 50g-8g=42 g
Volume of distilled water required: 42g/1g/mL=42mL
Step 2: Use a balance to weigh 8g of sodium chloride, and use a graduated cylinder to measure 42mL of water.
Step 3: Put the weighed 8g of sodium chloride into the beaker, pour the measured 42mL of water, and stir with a glass rod to completely dissolve the sodium chloride.
Step 4: Bottle and label (indicate the drug name and solute mass fraction).
50g of 16% sodium chloride solution is now prepared.
problem analysis
If the solute mass fraction of the prepared solution is slightly greater or less than 16%, what do you think are the possible reasons?
1. The sodium chloride is weighed incorrectly.
2. When measuring water with a measuring cylinder, look down (or look up) to read.
3.……
What is the "degree" of liquor?
Liquor packages are marked with “degree”, such as 53-degree Maotai. The "degree" of liquor actually refers to the alcohol content in liquor. The content here does not refer to the mass fraction, but the volume fraction, that is, the volume ratio of alcohol to water is 53:47.
Keywords: solution teaching courseware, quantitative representation of solution composition teaching courseware, Beijing curriculum reform version ninth grade chemistry PPT courseware download, ninth grade chemistry slide courseware download, solution PPT courseware download, quantitative representation of solution composition PPT courseware download, .PPT format;
For more information about the "Quantitative Representation of Solution Compositions" PPT courseware, please click the "Quantitative Representation of Solution Compositions ppt" tab.
"Quantitative Expression of Solution Composition" Solution PPT Courseware 3:
"Quantitative Expression of Solution Composition" Solution PPT Courseware 3 Knowledge Review Knowledge Point 1 Regarding the calculation of solute mass fraction The solute mass fraction is the ratio of _______ mass and _______ mass. Relevant formulas: ①Solute mass fraction = solute mass/solution mass 100%..
"Quantitative Expression of Solution Composition" Solution PPT Courseware 2:
"Quantitative Expression of Solution Composition" Solution PPT Courseware 2 The more salt is added, the saltier the solution will be, and the greater the concentration will be. The concentration or dilution of a solution refers to the relative amount of solute content. It cannot accurately indicate the amount of solute contained in a certain amount of solution. How to express exactly...