Preparation of 0.1m H2S04 of 500cm3 flask
To prepare a 0.1 M H2SO4 (sulfuric acid) solution in a 500 cm3 flask, you'll need to follow these steps:
1. Calculate the amount of H2SO4 needed: The term "0.1 M" refers to the molarity of the solution, which represents the number of moles of solute per liter of solution. In this case, we want 0.1 moles per liter. Since we have a 500 cm3 flask (which is 0.5 liters), we would need 0.1 * 0.5 = 0.05 moles of H2SO4.
2. Determine the molar mass of H2SO4: The molar mass of H2SO4 is calculated by adding up the atomic masses of each element in the compound. In this case, the atomic mass of hydrogen (H) is 1 g/mol, sulfur (S) is 32 g/mol, and oxygen (O) is 16 g/mol. Therefore, the molar mass of H2SO4 is (2*1) + 32 + (4*16) = 98 g/mol.
3. Calculate the mass of H2SO4 needed: From the previous step, we know that we need 0.05 moles of H2SO4. By using the equation mass = moles * molar mass, we can determine the mass of H2SO4. In this case, the mass would be 0.05 * 98 = 4.9 grams.
4. Take the necessary safety precautions: Sulfuric acid is highly corrosive and can cause severe burns. Always wear appropriate personal protective equipment (PPE), such as gloves, goggles, and a lab coat, when handling sulfuric acid. Ensure you're in a well-ventilated area with a sink or other water source nearby.
5. Measure and weigh the required amount of H2SO4: Use a balance or weighing scale to measure out 4.9 grams of H2SO4. It is essential to handle the acid with care to prevent accidental spills or contact with your skin or eyes.
6. Add the measured H2SO4 to the 500 cm3 flask: Slowly pour the measured amount of H2SO4 into the flask. Be cautious, as it can produce heat and fumes when mixed with water. If necessary, use a funnel to avoid spills.
7. Add water to dilute the H2SO4: Once the H2SO4 is in the flask, add water to make up the volume to 500 cm3. Slowly pour in the water while stirring gently to ensure thorough mixing.
8. Label and store the solution: Label the flask with the details of the solution, including the concentration (0.1 M) and date of preparation. Keep it stored in a safe place away from heat and direct sunlight.
Please note that the preparation of sulfuric acid solutions requires proper lab techniques and safety precautions. It is recommended to consult a chemistry teacher or professional for guidance and supervision.