29. On the basis of the experimental results, which of the following effects would be most appropriate to test next to gain additional information about conductivity?
Your Answer is
Correct Answer is D
Explanation
The temperature in option A and the water in option C have actually been tested in 3 experiments; the effect of the color of the solute on conductivity in B is meaningless, because H2O and HCl are colorless, but the conductivity is still different, so you can only choose D