How many grams are there of KNO3 per 100 mL of water?
The correct answer and explanation is:
To calculate how many grams of KNO3 are present in 100 mL of water, we first need to know the solubility of KNO3 in water at a given temperature. The solubility of potassium nitrate (KNO3) in water depends on temperature, so it’s important to specify the temperature at which the solution is being prepared.
At 20°C, the solubility of KNO3 in water is around 38 grams per 100 mL. This means that at 20°C, you can dissolve up to 38 grams of KNO3 in 100 mL of water before the solution becomes saturated. If the temperature increases, the solubility of KNO3 also increases, meaning more KNO3 can dissolve in the same amount of water.
If you’re working with a solution at 20°C, the maximum amount of KNO3 that can dissolve in 100 mL of water is 38 grams. For example, if you were preparing a solution and wanted to know how much KNO3 to add, you would add 38 grams per 100 mL of water to achieve a saturated solution.
To summarize, the amount of KNO3 that can be dissolved in 100 mL of water varies with temperature, and at 20°C, it is approximately 38 grams. However, if the temperature is different, you would need to refer to a solubility table specific to the temperature you are working with to determine the exact amount.