Describe the procedure to prepare this solution:
100 mL of a solution 0.1 M of KMnO4
Help? I don't understand what this implies.
What's the definition of M? It's molarity = mols/L. You know L and M; you don't know mols so solve for mols you need.
How do you get grams from mols? That's mols = grams/molar mass. You know molar mass and mols, solve for grams.
Place that many grams KMnO4 in a 100 mL volumetric flask, add a little water, swirl until all is dissolved, add DI water to the mark on the volumetric flask, mix thoroughly, stopper.
That will prepare 100 mL of 0.1M KMnO4 solution.
To prepare a 100 mL solution with a concentration of 0.1 M of KMnO4, you will need the following materials and follow these steps:
Materials:
1. KMnO4 (potassium permanganate) solid
2. Distilled water
3. A glass container or beaker
4. A stirring rod or magnetic stirrer
5. Measuring cylinder or pipette
6. Weighing scale (if necessary)
Procedure:
1. Start by calculating the amount of KMnO4 needed to make a 0.1 M solution. This calculation involves using the formula:
Moles = Concentration (M) x Volume (L)
Since we want 100 mL of a 0.1 M solution, the volume in liters is 0.1 L. Hence, the moles can be calculated as follows:
Moles = 0.1 M x 0.1 L = 0.01 moles
2. Next, determine the molar mass of KMnO4. The molar mass of potassium (K) is 39.1 g/mol, manganese (Mn) is 54.9 g/mol, and oxygen (O) is 16.0 g/mol. By adding these values, we find:
Molar mass of KMnO4 = (39.1 g/mol) + (54.9 g/mol) + (4 x 16.0 g/mol) = 158.0 g/mol
3. Now, calculate the mass of KMnO4 required using the moles calculated in step 1 and the molar mass determined in step 2:
Mass of KMnO4 = Moles x Molar mass
Mass of KMnO4 = 0.01 moles x 158.0 g/mol
4. After obtaining the mass of KMnO4 needed, weigh out this amount using a weighing scale. Make sure to use proper laboratory safety precautions during this step.
5. Transfer the weighed KMnO4 into a glass container or beaker.
6. Add distilled water to the container gradually while stirring with a stirring rod or using a magnetic stirrer. Continue adding water until the total volume reaches 100 mL.
7. Once you have added the required amount of water, stir the solution to ensure that the KMnO4 is evenly dissolved and distributed throughout the solution.
8. Your 100 mL solution of 0.1 M KMnO4 is now prepared and ready for use.
Remember to handle KMnO4 with caution, as it is a strong oxidizing agent and can cause stains and burns.