Answer :
The student can use the sodium chloride equation to determine which liquid is which. The equation is:
- NaCl(s) ⇄ Na+(aq) + Cl–(aq)
What is Le Châtelier's principle?
It is the act of causing a disturbance in a chemical equilibrium system, which moves in the direction of canceling the disturbance and adjusting to reach a new equilibrium.
So if you add sodium chloride to a drink, the electrolyte goes to the left, if you add more water, it migrates to the right, so the student can determine each liquid effectively.
Find out more about Le Châtelier principle here:
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