Answer:
When a solution of silver nitrate is added to a solution of sodium chloride, the silver ions combine with the chloride ions to form a precipitate of silver chloride. The sodium and the nitrate ions are nonparticipating spectator ions. ... Like all equations, net ionic equations must be balanced.
Explanation:
source:
www.chem.uiuc.edu
Answer:
A control variable in scientific experimentation is an experimental element which is constant and unchanged throughout the course of the investigation.
1. You could drain off the oil as a supernatant, since oil is less dense than water.
2. You could attempt to evaporate the water since they have different boiling points (212 vs 572 F), and then condense it in a separate container using a distillation unit.