PASCO ME-6940 - Manual
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Table of Contents:
- Page 2 – A b o u t t h e M e m b r a n e
- Page 3 – Membranes are; Maintenance and Care; U s i n g t h e A p p a r a t u s; Soak the membranes
- Page 4 – Fill the cylinders; : Connect the sensor to the interface. View; Reduce the sampling rate; : If you are using the PASPORT Dual Pres-
- Page 5 – S a m p l e A c t i v i t y; Procedure; Obtain 40 mL of distilled water.; Materials and Equipment; PASPORT Interface
- Page 6 – Reduce the sampling rate to 1 sample per minute.; Data; Table 1: Fluid Volume
- Page 7 – Table 3: Concentration; Data Analysis; Record the final volume of each solution in Table 1.; Analysis Questions
- Page 9 – S a m p l e D a t a
- Page 10 – Ta bl e 1 : F l u i d Vo l u m e; Analysis Questions and Answers; Answer
- Page 11 – A d d i t i o n a l E x p e r i m e n t s; A dd i t i o n a l E x p e r i m e n t s; Find the molecular mass (M; AP® Biology Lab 1: Diffusion and Osmosis*; Part one; R T
- Page 12 – T e c h n i c a l S u p p o r t; Part two; Te ch n i c a l S u p p o r t; For assistance with any PASCO product, contact PASCO at:; Patents Pending; Replacement Parts; Item; Sensor Mounting Stud
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I n s t r u c t i o n M a n u a l
0 1 2 - 1 0 9 6 2 A
D i f f u s i o n - O s m o s i s A p p a r a t u s
M E - 6 9 4 0
800-772-8700
www.pasco.com
* 0 1 2 - 1 0 9 6 2 *
I n t ro d u c t i o n
Open any biology textbook to the osmosis section and
you will find the image of a U-shaped tube composed of
two clear columns separated by a semi-permeable mem-
brane. (See Figure 1.) This classic figure is the most
commonly used model to visualize the osmotic move-
ment of water due to a concentration gradient. PASCO's
ME-6940 Diffusion-Osmosis Apparatus is a U-shaped
apparatus consisting of two cylinders separated by a
semi-permeable membrane. The transparent, graduated
cylinders allow students to observe and measure volume
changes due to osmosis. In conjunction with the
PASPORT Dual Pressure Sensor, the apparatus allows
students to measure the changes in pressure and volume
caused by the osmotic movement of water across a
semi-permeable membrane. With the use of other sen-
sors like conductivity, pH, carbon dioxide gas or oxygen
gas, students can explore the diffusion of molecules
across the semipermeable membrane.
Sensor
Mounting Stud
Semi-permeable
Membranes (25)
Diffusion-Osmosis
Apparatus
Tubing
Quick-release
Connectors
Caps
Bolts
Bolt
Bolt
Alignment
Tabs
Figure 1
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Summary
M o d e l N o . M E - 6 9 4 0 A b o u t t h e M e m b r a n e 2 The ME-6940 Diffusion-Osmosis Apparatus is patent pending. *The ME-6942 Diffusion-Osmosis Kit includes the Diffusion-Osmosis Apparatus and the PASPORT Dual Pressure Sensor. The PASPORT sensors work with a PASPORT interface such as the o...
M o d e l N o . M E - 6 9 4 0 U s i n g t h e A p p a r a t u s 3 • Membranes cannot be reused if they are allowed to dry out. Drying causes unrecoverable collapse of the pore structure. • Membranes are resistant to the following groups: halogenated hydrocarbons, alcohols, ketones, esters, oxides an...
M o d e l N o . M E - 6 9 4 0 U s i n g t h e A p p a r a t u s 4 • Ensure that the two holes of the membrane are lined up with the pegs on the cylinder and then carefully place the other cylinder against the membrane so that the two raised pegs on the second cylinder go into the two empty holes on ...
