Experimental Procedure Graphing 1. Obtain a 100 mL graduated cylinder. Add 10.0 mL of the liquid to be analyzed to the cylinder and obtain the mass. Write this mass on the results table. NOTE: it does not have to be exactly 10.0 mL. If something other than 10.0 mL is added, note that change on the data table. 2. Continue to add 10mL portions of liquid to the cylinder and obtain the mass each time. Write the cumulative volume, making sure to measure your total volume accurately with each addition, and its corresponding mass in the table. DO NOT EMPTY THE CYLINDER BETWEEN ADDITIONS OF LIQUID. 3. Dispose of the liquid in the appropriate container in the fume -hood. 4. Draw a graph of mass versus volume. Use the guidelines set forth in the example. Make sure the graph takes up as much of the graph paper as possible Graphing Increments For the X-axis: Highest X value –Lowest X value/ #of boxes(15) =__ Round up to Increments For the Y-axis:Highest Y value –Lowest Y value/# of boxes(20)= _Round up to Start numbering the X axis at 0 Start numbering the Y axis at Points used to obtain slope (must NOT be data points)__ and_ Slope= =_ (with units) Y- intercept = Equation of the line = The slope represents the____of the liquid. The y-intercept is the_of the______. .

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter29: Supercritical Fluid Chromatography And Extraction

Section: Chapter Questions

Problem 29.1QAP

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Experimental Procedure Graphing

Obtain a 100 mL graduated cylinder. Add 10.0 mL of the liquid to be analyzed to the cylinder and obtain the mass. Write this mass on the results table. NOTE: it does not have to be exactly 10.0 mL. If something other than 10.0 mL is added, note that change on the data table.

Continue to add 10mL portions of liquid to the cylinder and obtain the mass each time. Write the cumulative volume, making sure to measure your total volume accurately with each addition, and its corresponding mass in the table. DO NOT EMPTY THE CYLINDER BETWEEN ADDITIONS OF LIQUID.

Dispose of the liquid in the appropriate container in the fume

-hood.

Draw a graph of mass versus volume. Use the guidelines set forth in the example. Make sure the graph takes up as much of the graph paper as possible

Graphing

Increments

For the X-axis: Highest X value –Lowest X value/ #of boxes(15) =____

Round up to____

Increments

For the Y-axis:Highest Y value –Lowest Y value/# of boxes(20)= ___Round up to ____

Start numbering the X axis at 0

Start numbering the Y axis at ______

Points used to obtain slope (must NOT be data points)________ and_______ Slope=______ =_________ (with units)

Y- intercept =

Equation of the line =

The slope represents the____________of the liquid.

The y-intercept is the_______of the________.

Recorded Data
Results
Volume of liquid (mL)
Mass of grad. cyl. + liquid (g)
10.0
165.95
20.0
178.70
30.0
191.45
40.0
204.10
50.0
216.80
60.0
229.45

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