Discover a world of knowledge at Westonci.ca, where experts and enthusiasts come together to answer your questions. Connect with a community of experts ready to help you find solutions to your questions quickly and accurately. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.
Sagot :
To determine which compound would be most effective in lowering the melting point of ice on roads, we need to consider the colligative properties of the compounds. Colligative properties depend on the number of particles in a solution, not the nature of the particles. One of the key properties influenced by the number of dissolved particles is the melting point depression (how much the melting point is lowered).
Let's examine each compound based on its dissociation in water:
1. NaCl (Sodium Chloride):
- Dissociation: NaCl dissociates into two ions: [tex]\( \text{Na}^+ \)[/tex] and [tex]\( \text{Cl}^- \)[/tex].
- Total Ions Produced: 2 ions.
2. [tex]\( KNO_3 \)[/tex] (Potassium Nitrate):
- Dissociation: [tex]\( KNO_3 \)[/tex] dissociates into two ions: [tex]\( \text{K}^+ \)[/tex] and [tex]\( \text{NO}_3^- \)[/tex].
- Total Ions Produced: 2 ions.
3. [tex]\( C_6H_{12}O_6 \)[/tex] (Glucose):
- Dissociation: [tex]\( C_6H_{12}O_6 \)[/tex] does not dissociate in water. It remains as one molecule. It's a non-electrolyte.
- Total Ions Produced: 0 ions.
4. [tex]\( CaCl_2 \)[/tex] (Calcium Chloride):
- Dissociation: [tex]\( CaCl_2 \)[/tex] dissociates into three ions: [tex]\( \text{Ca}^{2+} \)[/tex] and 2 [tex]\( \text{Cl}^- \)[/tex].
- Total Ions Produced: 3 ions.
The effectiveness of each compound in lowering the melting point of ice is proportional to the number of ions it produces when it dissociates in water. The more ions produced, the greater the melting point depression.
- NaCl produces 2 ions.
- [tex]\( KNO_3 \)[/tex] produces 2 ions.
- [tex]\( C_6H_{12}O_6 \)[/tex] produces 0 ions.
- [tex]\( CaCl_2 \)[/tex] produces 3 ions.
Since [tex]\( CaCl_2 \)[/tex] produces the most ions (3 ions), it will be the most effective in lowering the melting point of ice.
Thus, the correct answer is:
d. [tex]\( CaCl_2 \)[/tex]
Let's examine each compound based on its dissociation in water:
1. NaCl (Sodium Chloride):
- Dissociation: NaCl dissociates into two ions: [tex]\( \text{Na}^+ \)[/tex] and [tex]\( \text{Cl}^- \)[/tex].
- Total Ions Produced: 2 ions.
2. [tex]\( KNO_3 \)[/tex] (Potassium Nitrate):
- Dissociation: [tex]\( KNO_3 \)[/tex] dissociates into two ions: [tex]\( \text{K}^+ \)[/tex] and [tex]\( \text{NO}_3^- \)[/tex].
- Total Ions Produced: 2 ions.
3. [tex]\( C_6H_{12}O_6 \)[/tex] (Glucose):
- Dissociation: [tex]\( C_6H_{12}O_6 \)[/tex] does not dissociate in water. It remains as one molecule. It's a non-electrolyte.
- Total Ions Produced: 0 ions.
4. [tex]\( CaCl_2 \)[/tex] (Calcium Chloride):
- Dissociation: [tex]\( CaCl_2 \)[/tex] dissociates into three ions: [tex]\( \text{Ca}^{2+} \)[/tex] and 2 [tex]\( \text{Cl}^- \)[/tex].
- Total Ions Produced: 3 ions.
The effectiveness of each compound in lowering the melting point of ice is proportional to the number of ions it produces when it dissociates in water. The more ions produced, the greater the melting point depression.
- NaCl produces 2 ions.
- [tex]\( KNO_3 \)[/tex] produces 2 ions.
- [tex]\( C_6H_{12}O_6 \)[/tex] produces 0 ions.
- [tex]\( CaCl_2 \)[/tex] produces 3 ions.
Since [tex]\( CaCl_2 \)[/tex] produces the most ions (3 ions), it will be the most effective in lowering the melting point of ice.
Thus, the correct answer is:
d. [tex]\( CaCl_2 \)[/tex]
Thank you for choosing our service. We're dedicated to providing the best answers for all your questions. Visit us again. We hope this was helpful. Please come back whenever you need more information or answers to your queries. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.