Prepare Accurate Solutions with Volumetric Flask
How can we ensure accurate solution preparation using a volumetric flask?
a. After the solvent is added, stopper and invert the flask to mix the solution.
b. If solvent is accidentally added to the flask over the fill line, dump the excess.
c. Do not worry if some undissolved solid remains at the bottom of the flask.
d. Read the liquid volume at eye level from the bottom of the meniscus.
Answer:
The techniques for accurate solution preparation using a volumetric flask include inverting the flask, discarding excess solvent, and reading the liquid volume at eye level. Also, any undissolved solid should be dissolved before making the final volume measurement.
The techniques to be used for accurate solution preparation using a volumetric flask include:
1. Inverting the flask: After adding the solvent, stopper the flask and invert it to thoroughly mix the solution.
2. Discarding excess solvent: If solvent is accidentally added over the fill line, dump the excess to ensure the correct concentration.
3. Reading the liquid volume: Always read the liquid volume at eye level from the bottom of the meniscus to obtain an accurate measurement.
4. Dissolving undissolved solid: If any solid remains at the bottom of the flask, ensure it is completely dissolved before final volume measurement.