Textbook Question
A KCl solution containing 38 g of KCl per 100.0 g of water is cooled from 60 °C to 0 °C. What happens during cooling? (Use Figure 14.11.)
14. Solutions
Types of Aqueous Solutions
Multiple Choice
Which of the following types of aqueous solutions is formed when salt (such as NaCl) is dissolved in water?
A
Suspension
B
Electrolyte solution
C
Nonelectrolyte solution
D
Colloidal solution
Verified step by step guidance1
Step 1: Understand the nature of salt (NaCl) when dissolved in water. NaCl is an ionic compound composed of Na⁺ and Cl⁻ ions.
Step 2: When NaCl dissolves in water, it dissociates completely into its constituent ions, Na⁺ and Cl⁻, which are free to move in the solution.
Step 3: Because the solution contains free ions that can conduct electricity, the solution is classified as an electrolyte solution.
Step 4: Differentiate this from other types of solutions: a suspension contains large particles that settle out, a colloidal solution contains particles that are intermediate in size and do not settle, and a nonelectrolyte solution contains molecules that do not dissociate into ions and thus do not conduct electricity.
Step 5: Conclude that since NaCl dissociates into ions and conducts electricity, the aqueous solution formed is an electrolyte solution.
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