|
Chemistry 103/113 Laboratory |
|
|
|
More About Conductivity |
|
|
The Conductivity Meter · Meter detects the presence of ‘charge carriers’ o Conduction = movement of charge ·
In air, the circuit
between the electrodes is incomplete ·
No current can flow
in the wires ·
The LED does not
light · When ‘charge carriers’ are present between the
electrodes, the circuit is complete · Current flows · The LED lights · More charge carriers = more conduction = brighter
light Experiment With the Conductivity
Meter ·
Place electrodes in
contact with ·
a metal (e.g., a key) ·
distilled water ·
solution of aqueous
Na2CO3 ·
For each material ·
What happens? ·
Are there charge carriers
present? ·
If so, what are
they? What Happens When Electrodes (Under
Voltage) Are Placed in a Solution of Ions? |
