according to the data in the merck index,if 1,0g of aspirin is dissolved in 100ml of water at 37,how much aspirin will precipitate out of solution when it is cooled to 25.
You also need the solubility of ASA at 25.
1.48
To determine the amount of aspirin that will precipitate out of the solution when it is cooled to 25°C, we need to consider the solubility of aspirin in water at different temperatures.
According to the Merck Index, the solubility of aspirin in water at 37°C is approximately 1.0 g/100 mL. However, the solubility decreases as the temperature decreases.
Unfortunately, the exact solubility of aspirin in water at 25°C is not provided in the given information. To make an estimation, we can assume that the solubility of aspirin at 25°C is lower than at 37°C.
Since 1.0 g of aspirin is dissolved in 100 mL of water at 37°C, it is safe to assume that at 25°C, a portion of the dissolved aspirin will precipitate out of the solution due to decreased solubility.
However, without specific solubility data at 25°C, it is not possible to determine the exact amount of aspirin that will precipitate out of the solution.
To determine how much aspirin will precipitate out of the solution when it is cooled from 37°C to 25°C, we need to consider the solubility of aspirin at different temperatures. The solubility of aspirin in water decreases as the temperature decreases.
Before proceeding further, it's important to note that I don't have access to real-time data from the Merck Index or other external sources. Therefore, I cannot provide the exact solubility of aspirin at different temperatures. However, I can guide you through the process of finding the information and calculating the answer.
To determine the solubility of aspirin at different temperatures, you can refer to the Merck Index or other reliable sources on the solubility of aspirin. The Merck Index provides information on the physical properties, including solubility, of various compounds.
Here's how you can find the solubility data in the Merck Index:
1. Access the Merck Index: You can search for the Merck Index online or check if you have a physical copy of the book available.
2. Look up aspirin: Once you have accessed the Merck Index, search for aspirin. Look for the relevant entry and find the information on the solubility of aspirin.
3. Note the solubility at different temperatures: The solubility data might be presented as a range or a specific value at different temperatures. Make sure to note the solubility values at 37°C and 25°C or the closest temperatures available.
After obtaining the solubility data at 37°C and 25°C, you can proceed with the calculation:
1. Calculate the volume of water required to dissolve 1.0 g of aspirin at 37°C: Use the solubility information at 37°C to determine the volume of water needed to dissolve 1.0 g of aspirin at this temperature.
2. Calculate the excess water: Determine the excess water present in the solution by subtracting the volume required to dissolve 1.0 g of aspirin from the total volume of the solution (100 mL).
3. Calculate the amount of aspirin that will precipitate: Use the difference in solubility at 25°C and 37°C to estimate the aspirin precipitation. Since the solubility decreases as the temperature decreases, some of the dissolved aspirin will come out of solution. The exact amount can be calculated using the solubility data.
Please note that the actual calculation will depend on the solubility data you obtain from the Merck Index or other reliable sources. Remember to consider the units of solubility and follow the appropriate calculations to determine the amount of precipitated aspirin.