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Conductivity

Conductivity

A250/0124

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Credit

CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY

Caption

Conductivity. Demonstration of the electrical conductivity of potassium chloride (KCl) solution. The bulb is connected to a battery and two electrodes, forming an incomplete circuit. Because the solution conducts electricity, a current flows between the electrodes. This completes the circuit and allows the bulb to light. Pure water will not allow a current to flow. Potassium chloride is conductive because it is ionic: it splits into charged particles (ions) of K+ and Cl- in solution. It is these ions which allow the current to flow.

Release details

Model release not required. Property release not required.

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