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C H O You have your choice of sucrose, 12*2211, sodium chloride, NaCl or cal- CaCl 2 to use to melt the ice on the driveway. Explain why cium chloride, each choice will melt the ice, but also include which is the best choice and why.

C H O You have your choice of sucrose, 12*2211, sodium chloride, NaCl or cal- CaCl 2 to use to melt the ice on the driveway. Explain why cium chloride, each choice will melt the ice, but also include which is the best choice and why.

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter1: The Nature Of Chemistry
Section: Chapter Questions
Problem 13QRT
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### Selecting the Best Substance to Melt Ice on Driveways You have your choice of sucrose, **C<sub>12</sub>H<sub>22</sub>O<sub>11</sub>**, sodium chloride, **NaCl**, or calcium chloride, **CaCl<sub>2</sub>**, to use to melt the ice on the driveway. Explain why each choice will melt the ice, but also include which is the best choice and why. ### Explanation: 1. **Sucrose (C<sub>12</sub>H<sub>22</sub>O<sub>11</sub>):** - Sucrose (table sugar) can lower the freezing point of water, but it is not typically used to melt ice. Its effectiveness is limited at very low temperatures and large quantities are required to achieve a noticeable effect. 2. **Sodium Chloride (NaCl):** - Sodium chloride, commonly known as table salt, is effective at melting ice. It works by lowering the freezing point of water, causing ice to melt at temperatures lower than 0°C (32°F). NaCl is widely used for deicing because it is affordable and readily available. - However, its effectiveness decreases as temperatures drop below about -9°C (15°F). 3. **Calcium Chloride (CaCl<sub>2</sub>):** - Calcium chloride is highly effective at melting ice, even at lower temperatures. Like sodium chloride, it lowers the freezing point of water. However, it can work at temperatures as low as -25°C (-13°F) because it releases heat when dissolving, which helps to further melt the ice. - It is considered the best choice among these options for melting ice, especially in freezing conditions, due to its high efficiency. ### Best Choice: **Calcium Chloride (CaCl<sub>2</sub>)** is the best choice for melting ice on driveways. It is more efficient and effective at lower temperatures than both sucrose and sodium chloride, making it a superior option for severe winter conditions.
Transcribed Image Text:### Selecting the Best Substance to Melt Ice on Driveways You have your choice of sucrose, **C<sub>12</sub>H<sub>22</sub>O<sub>11</sub>**, sodium chloride, **NaCl**, or calcium chloride, **CaCl<sub>2</sub>**, to use to melt the ice on the driveway. Explain why each choice will melt the ice, but also include which is the best choice and why. ### Explanation: 1. **Sucrose (C<sub>12</sub>H<sub>22</sub>O<sub>11</sub>):** - Sucrose (table sugar) can lower the freezing point of water, but it is not typically used to melt ice. Its effectiveness is limited at very low temperatures and large quantities are required to achieve a noticeable effect. 2. **Sodium Chloride (NaCl):** - Sodium chloride, commonly known as table salt, is effective at melting ice. It works by lowering the freezing point of water, causing ice to melt at temperatures lower than 0°C (32°F). NaCl is widely used for deicing because it is affordable and readily available. - However, its effectiveness decreases as temperatures drop below about -9°C (15°F). 3. **Calcium Chloride (CaCl<sub>2</sub>):** - Calcium chloride is highly effective at melting ice, even at lower temperatures. Like sodium chloride, it lowers the freezing point of water. However, it can work at temperatures as low as -25°C (-13°F) because it releases heat when dissolving, which helps to further melt the ice. - It is considered the best choice among these options for melting ice, especially in freezing conditions, due to its high efficiency. ### Best Choice: **Calcium Chloride (CaCl<sub>2</sub>)** is the best choice for melting ice on driveways. It is more efficient and effective at lower temperatures than both sucrose and sodium chloride, making it a superior option for severe winter conditions.
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