Question

Which is/are the example(s) of electrolytes?
A) Saltwater
B) Sugar water
C) Copper sulphate solution
D) Lemon water

Answer 1

Hint: Substances that can dissociate into ions when diluted into a solution can conduct electricity. Such a substance is called electrolytes. When dissolved the cations and anions are separated and distributed uniformly throughout the solvent. In the options, there are more than one electrolytes given.

Complete step by step solution:
Electrolytes are minerals that contain electrical charges. When dissolved in a polar solvent produces an electrically conducting solvent. Anions and cations move in opposite directions. In electrolytic solutions, the anions move towards the anodes and the cathodes move towards cations. Electrolytes are mostly soluble salts, bases, and acids. Electrolytes are also essential for the functioning of the body.
Saltwater, lemon water, and copper sulphate solution are examples of electrolytes.

Sodium chloride is a soluble salt and it has sodium and chloride ions in it. Lemon water is acidic and has potassium, calcium and magnesium ions. Copper sulphate is the solute and it dissolves in water producing copper and sulphate ions.

Therefore, the answers are Option (A), Option (C), and Option (D): Saltwater, Copper sulphate solution, and lemon water.

Note: If the concentration of ions is high the electrolyte is concentrated. If the concentration of ions is less the electrolyte is diluted. If the solute dissociates to produce a large number of ions then the electrolyte is strong. If the solute does not dissociate well then it is a weak electrolyte. The properties of electrolytes are mainly used in electrolysis. Electrolytes are very essential for many bodily functions. The regulation of hydration of the body and the pH level of blood is maintained by electrolytes. Electrolytes are essential for nerve and muscle functions also. Another major use of electrolytes is in batteries. Hygrometers, electrolytic capacitors, electroplating, fuel cells, etc. are other major applications of electrolytes.