"Preparing a solution with a certain solute mass fraction" solution PPT

Description

"Preparing a solution with a certain solute mass fraction" solution PPT, 25 pages in total.

solute mass fraction

Mass of solute = mass of solution

Mass of solvent = Mass of solution – Mass of solute

In the hospital, we often see patients receiving infusions, many of which are sodium chloride saline.

Prepare 50g of 6% salt solution

Now that you want to prepare this salt solution, please think about how to do it?

Summarize the experimental procedures and corresponding instruments used.

Summarize:

1. Steps

(1) Calculation

(2) Weighing (measurement)

(3) Dissolve

(4) Bottle and store (label well)

2. Instruments

Pallet balance, medicine spoon, measuring cylinder, plastic tip dropper, beaker, glass rod

collaborative inquiry

Use sodium chloride solid and water to prepare 50g 6� sodium chloride solution

Question one

Use 50g of the 6% sodium chloride solution you prepared and dilute it into a 0.9% sodium chloride solution, using the method you used.

Question 2

When a classmate prepared 50g of 6% sodium chloride solution, the actual solute mass fraction was less than 6%. Could you please help this classmate analyze the possible reasons for this situation?

Classroom testing

1. Preparing a solution with a certain solute mass fraction, correct operating steps ( )

A weigh (measure), calculate, dissolve B calculate, weigh (measure), dissolve

C Calculate, dissolve, weigh (measure) D Dissolve, calculate, weigh (measure)

2. Use concentrated sulfuric acid to prepare a certain mass fraction of dilute sulfuric acid. The instrument that does not need to be used is ( )

A.Pallet balance B.Beaker C.Graduating cylinder D.Glass rod

3. To prepare 100g of sodium chloride solution with a solute mass fraction of 10%, the following operations are correct ( )

A. Place 10g of sodium chloride solid directly on the tray of the balance and weigh it

B. When measuring 90ml of water, read from above

C. To speed up the dissolution of the solid, stir the solution with a thermometer

D. Pour the prepared solution into a narrow-mouth bottle, cap the bottle tightly, and label it

Keywords: Free download of Chemistry PPT courseware for the first volume of the ninth grade of the Lujiao Education Edition, download of the PPT of preparing a solution with a certain solute mass fraction, download of the solution PPT, .PPT format;

For more information about the PPT courseware "Preparing a Solution with a Certain Solute Mass Fraction from a Solution", please click the PPT tab of Solution PPT Preparing a Solution with a Certain Solute Mass Fraction.

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Update Time: 2024-10-16

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

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