Place 10 drops of each solution in the shallow well plate and test the conductivity using the conductivity probe. Clean the probe with d. i. water between solutions. b) Report the bulb intensity. c) In the beaker draw the molecules or ions at the molecular level. d) Deduce the solution conductivity, e) add universal indicator to the well to estimate the pH of the solution, and f) explain how the molecules, as drawn, result in the conductivity and pH observed.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.