Question

how can testing conductivity help us identify a pure substance?

Explanation:

Pure substances have characteristic conductivity values. Conductivity measures the ability to conduct electricity. Different pure substances, like metals and non - metals, have distinct conductivity ranges. By testing conductivity, we can compare the measured value to known ranges for pure substances to help identify it.

Answer:

Testing conductivity helps identify a pure substance by comparing the measured conductivity value to the known conductivity ranges of different pure substances, as different pure substances have characteristic conductivity values related to their ability to conduct electricity.