Can you prepare a solution of 650 g of KNO3 in 1 L of water at room temperature?
Only if it is supersaturated.
http://www.thechemguy.com/chem/U09%20Folder/SolubilityReading_files/image019.gif
Yes, I can help you prepare a solution of 650 g of KNO3 in 1 L of water at room temperature. To prepare this solution, you will need to follow these steps:
1. Determine the molar mass of KNO3:
- K (potassium) has an atomic mass of 39.10 g/mol.
- N (nitrogen) has an atomic mass of 14.01 g/mol.
- O (oxygen) has an atomic mass of 16.00 g/mol.
Calculate the molar mass of KNO3 by adding up the individual atomic masses:
Molar mass (KNO3) = (39.10 g/mol) + (14.01 g/mol) + (16.00 g/mol x 3) = 101.10 g/mol.
2. Calculate the moles of KNO3 you need:
Divide the given mass of KNO3 by its molar mass:
Moles of KNO3 = Mass of KNO3 / Molar mass of KNO3
Moles of KNO3 = 650 g / 101.10 g/mol = 6.43 mol (rounded to two decimal places).
3. Determine the volume of water required:
Since you want to prepare the solution in 1 L of water, you already have the volume needed.
4. Dissolve the KNO3 in water:
Add the calculated mass of KNO3 (650 g) to 1 L of water at room temperature. Stir the mixture until the KNO3 is completely dissolved.
Keep in mind that KNO3 is highly soluble in water at room temperature, so it should dissolve easily. However, it's always a good idea to stir the solution gently to assist in the dissolution process.
Please note that working with chemicals can be potentially hazardous. It's important to take appropriate safety precautions, wear protective gear, and follow any local regulations or guidelines when handling chemicals.