Exciting Guide to Preparing Standard Solution from Liquid
How can you prepare a standard solution from liquid?
Use the steps below to answer the question:
- Rinse the pipette three times with small volumes of distilled water and add into the volumetric pipette
- Stopper the flask and swirl to ensure that all the solution is uniformly mixed
- Calculate the volume of the concentrated solution required for the dilution
- Transfer the concentrated solution to the volumetric flask
- Use water from the dropper bottle to fill the flask exactly to the marked line of the flask
- Measure the required volume of the concentrated solution using a pipette
- Stopper the flask and invert it three times to ensure thorough mixing
- Add distilled water to the flask until the level of the solution is about 1 cm the marked line of the flask
Answer:
To prepare a standard solution from liquid, follow these steps in the correct order: Rinse the pipette with distilled water, measure the required volume of concentrated solution, transfer it to a volumetric flask, add water to the flask, stopper and invert the flask for mixing, and finally, swirl the solution in the flask for uniformity.
Explanation:
In the lab procedure for preparing a standard solution from liquid, several sequential steps ensure accurate and reproducible results. Firstly, the pipette should be rinsed three times with small volumes of distilled water to eliminate any residual impurities. The required volume of the concentrated solution is then measured precisely using the pipette, followed by careful transfer to a volumetric flask.
To reach the desired concentration, distilled water is added to the flask until the solution's level is about 1 cm below the marked line on the flask. This is essential for achieving accurate dilution. After adding the water, the flask should be stoppered and inverted three times to ensure thorough mixing, enhancing homogeneity. Swirling the solution after stoppering aids in uniform distribution.
Overall, these steps guarantee the preparation of a standard solution with precision and reliability, which is crucial for analytical work. By following this procedure diligently, researchers can ensure that the concentration of the prepared solution is consistent and accurate.