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Doodle
Posts: 1
Joined: Sun Jan 12, 2014 6:22 pm
Occupation: Student
Project Question: How do I place a multimeter to measure the current through a salt bridge? I am trying to measure more than just the pH change over time in my project.
Project Due Date: 01/27/14
Project Status: I am conducting my experiment

Help!

Post by Doodle »

How can I insert a multimeter to measure current through a salt bridge? I want to measure more than just the pH change.
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rmarz
Expert
Posts: 634
Joined: Sat Oct 25, 2008 1:26 pm
Occupation: Technology Consultant
Project Question: n/a
Project Due Date: n/a
Project Status: Not applicable

Re: Help!

Post by rmarz »

Doodle - I don't know what the resistance of the salt bridge is, but the simplest way to measure current through the bridge is to select a DC voltage such as 1.5 or 3.0 or 9 volts (all easily available through battery selection) and place in series with the multimeter and electrodes placed in each of the liquid containers connected by the salt bridge. You will be able to measure DC current directly on the multimeter.

Rick Marz
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